Seattle Mariners right-hander Luis Castillo is set to start Monday's game against the Athletics. Bryce Miller will come out of the bullpen and follow in the piggyback role. Castillo has struggled this season, posting a 6.41 ERA, 1.55 WHIP, and 47 strikeouts across 46 1/3 innings. The 33-year-old struggled in his only relief appearance, taking the loss, while allowing two runs on a hit, two walks, and a HBP while striking out four over 2 1/3 innings against the Chicago White Sox. It's unclear how many innings Castillo will throw on Monday, but Miller has pitched well since returning from the injured list on May 13. The 27-year-old owns a 1.64 ERA, 1.00 WHIP, a 22.7K%, and a 4.5 BB% through 11 innings. Even though Miller is coming out of the bullpen, he's still worth holding onto in deep league formats, but can likely be dropped in 10-12-team leagues until he solidifies a spot in Seattle's rotation.

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Toronto Blue Jays right-hander Dylan Cease (hamstring) was removed from Sunday's game against the Pittsburgh Pirates with mild left hamstring discomfort. After a few visits from the trainers, Cease was pulled from the game during the fifth inning. He allowed two earned runs on four hits and one walk while striking out eight across 4 2/3 innings before exiting. The 30-year-old will likely undergo additional tests to determine the severity of his hamstring issue. He owns a 3.05 ERA, 1.21 WHIP, and a 92:26 K:BB across 62 innings so far this season. Cease is tentatively scheduled to face the Orioles at Camden Yards in Baltimore. Fantasy managers should monitor the situation as the Blue Jays continue to provide updates on his status.

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Toronto Blue Jays first baseman Vladimir Guerrero Jr. (elbow) was removed in the bottom of the fifth inning during Sunday's game against the Pittsburgh Pirates after being hit by a pitch. He reached base in all three plate appearances and scored a run before exiting. X-rays of the Guerrero Jr.'s elbow were negative for a fracture, and he was officially diagnosed with an elbow contusion. The 27-year-old appears to have avoided a major injury and is day-to-day for now. His next chance to return to the lineup will be on Monday against the Miami Marlins. Lenyn Sosa replaced Guerrero Jr. on Sunday and would see an uptick in at-bats if he were to miss any additional time.

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Chicago Cubs outfielder Ian Happ is out of the lineup for Sunday's game against the Houston Astros for a "mental breather." Cubs manager Craig Counsell said, "he told him to take Saturday off completely, and Sunday, he's been hitting and doing other typical pregame work. The 31-year-old has struggled mightily over his last six games, slashing .042/.115/.083 with 14 strikeouts across 26 plate appearances. Overall, Happ had been solid, slashing .214/.350/.429 with 10 home runs, 20 RBI, 35 runs, and two stolen bases through 220 plate appearances. His walk BB% has increased from 13.1% last season to 16.4%, while his K% has ballooned from 22.8% to 33.2%. Although there is cause for some concern, fantasy managers should continue to hold onto Happ as he works his way back through his slump. Happ is expected to return to the Cubs lineup for Monday's contest against the Pittsburgh Pirates.

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The Chicago Cubs placed right-hander Edward Cabrera (finer) on the 15-day injured list due to a blister on his right middle finger, retroactive to May 21. He was pulled from Wednesday's start against the Milwaukee Brewers early after allowing our runs (one earned) on four hits and two walks while striking out two batters across three innings. Before landing on the injured list, Cabrera owned a (3-2) record with a 4.00 ERA, 1.35 WHIP, and a 47:20 K:BB across 54 innings this season. The Cubs recalled left-hander Jordan Wicks in a corresponding move, and he will take Cabrera's spot in the rotation. Wicks owns a 4.44 ERA, 1.57 WHIP, and 20 strikeouts across 26 1/3 innings with Triple-A Iowa. The 26-year-old has pitched well recently, posting a 0.60 ERA, 1.00 WHIP, and 12 strikeouts over 15 innings. Wicks is scheduled to start on the road against the Pittsburgh Pirates on Tuesday. He is mainly a streaming option in deep and NL-Only leagues for now.

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Pittsburgh Pirates right-hander Jared Jones (elbow) is an elite injury stash target for upside, even though he's still on the 60-day injured list. According to general manager Ben Cherington, Jones will meet with the team back in Pittsburgh and throw a bullpen session on Tuesday before "making a determination" on his next outing/activation, per Colin Beazley of the Pittsburgh Post-Gazette. Cherington did not clarify whether Jones will be a starter or a reliever. He's under consideration for a return from the IL, but the Pirates want to make sure his recovery continues to go well. The 24-year-old former second-rounder in 2020 threw 76 pitches and allowed three runs while walking three and striking out six in 4 1/3 innings in his latest minor-league rehab outing on Saturday at Triple-A Indianapolis. Jones has a 2.89 ERA, 1.02 WHIP, and 24:6 K:BB in 18 2/3 frames over his five rehab starts with Single-A Bradenton, Double-A Altoona, and Indy, and is on the cusp of returning after he missed all of 2025 due to UCL surgery on his right elbow. He's currently rostered in only 21% of Yahoo leagues and is one of the best pitching stashes in fantasy right now.

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Texas Rangers outfielder Wyatt Langford (forearm) threw and hit on Friday for the first time in three weeks, according to Shawn McFarland of The Dallas Morning News. Langford will do the same routine for another week or so before going on a minor-league rehab assignment. "It's much healthier now than it was when I was trying to come back the first time," Langford said. The 24-year-old is currently on the 10-day injured list and has not played since April 21 due to right-forearm soreness. Langford already had a setback with his forearm and was pulled from a rehab assignment. It's good news that he's swinging and throwing again, but fantasy managers shouldn't expect him to return until at least early June. The former fourth overall pick in 2023 out of the University of Florida has high-end power/speed upside in the outfield in Texas, but injuries have been piling up for him early in his career. He has only played in 20 games in 2026 and has hit .238 (19-for-80) with a homer, four RBI, three steals, and nine runs scored across 84 plate appearances. Langford is still rostered in 89% of Yahoo leagues, though, after hitting 38 home runs, driving in 136, and stealing 41 bases in 268 games in his first two years in the majors.

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Los Angeles Dodgers third baseman Max Muncy (wrist) remains out of the team's starting lineup for Sunday's series finale in Milwaukee against the Brewers, according to MLB.com. Veteran Miguel Rojas will start at third base and will hit ninth in the batting order against Brewers right-hander Brandon Sproat. Muncy will miss the final two games of the series in Milwaukee after being hit by a pitch on his wrist on Friday in the loss. The 35-year-old veteran left-handed hitter is batting .258/.363/.515 on the season with an .878 OPS, 12 home runs, 19 RBI, and 36 runs scored across 48 games and 190 plate appearances so far in 2026 in his ninth year with L.A. The two-time All-Star has struggled a bit in May, batting .210 (13-for-62) with three long balls, two doubles, eight RBI, and 13 runs scored in 19 games played. Check back on Monday to see if he's feeling good enough to return for the series opener back in L.A. against the division-rival Colorado Rockies. Rojas has gone 20-for-75 (.267) this year with just one homer, and the Venezuelan should be avoided in DFS formats.

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New York Mets outfielder Juan Soto (illness) has been scratched from the team's starting lineup on Sunday in Miami against the division-rival Marlins due to the flu, according to Abbey Mastracco of the New York Daily News. Manager Carlos Mendoza said the flu has been going around the clubhouse this week. Tyrone Taylor is starting in left field and is batting eighth, while MJ Melendez is serving as the designated hitter and is batting seventh against Marlins right-hander Tyler Phillips. Fantasy managers will want to make sure Soto is out of their starting lineups for the series finale in South Beach and check back on Monday to see if he's feeling good enough to play in the series opener back in New York against the Cincinnati Reds. Soto got off to a slow start in 2026 and landed on the injured list with a calf injury, but he has been money of late, hitting .356 (16-for-45) with six home runs, 11 RBI, four steals, and 12 runs scored in 12 games since May 12. The four-time All-Star and six-time Silver Slugger winner has seven multi-hit games in that span. Soto is a must-start in all traditional fantasy leagues when he's active.

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Los Angeles Dodgers outfielder Teoscar Hernandez continued to swing the bat well in Saturday's 11-3 blowout win over the hosting Milwaukee Brewers at American Family Field and extended his current hitting streak to four games. Hernandez went 3-for-4 at the plate with a home run, six RBI, two runs scored, and a walk to raise his season average to .276 and his OPS to .796. The 33-year-old Dominican now has a modest four-game hitting streak and has gone 15-for-37 (.405) with three home runs, three doubles, 14 RBI, and 10 runs scored in his last 10 games since May 13. Hernandez is batting .333 (24-for-72) in May to boost his season line to .276/.349/.447 with seven home runs, 31 RBI, 28 runs scored, and a stolen base across 192 plate appearances. The big blow on Saturday against the Brew Crew was a three-run home run in the fourth inning, which helped him tie a career high with six runs driven in. The two-time All-Star has had at least 25 homers and 89 RBI in his two seasons in L.A., and even though he might not be a great source of average, the counting stats will be there as long as he stays healthy.

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Miami Marlins catcher/first baseman Liam Hicks was the catalyst for the team's offense in Saturday's win over the division-rival New York Mets at Loan Depot Park. Hicks went 2-for-4 at the plate with two solo home runs to raise his season average to .279 and his OPS to .842. The 26-year-old left-handed slugger took Mets starter Freddy Peralta deep twice for the first multi-home run game of his young career. The two home runs were Hicks' first since May 7, and he's now hitting .233 (17-for-73) with four long balls, a double, 16 RBI, and six runs scored across 21 games and 82 plate appearances this month. He had gone hitless in each of his last three games, so it was nice to see him break out on Saturday. In his second year in the big leagues, Hicks is breaking out for the Fish, hitting .279 (46-for-165) overall with 11 round-trippers, 44 RBI, 24 runs, and a steal in 50 games played. He also has a .339 on-base percentage, .503 slugging percentage, and .842 OPS. Hicks is rostered in 81% of Yahoo leagues.

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Atlanta Braves right-hander Grant Holmes had a third straight strong start on Saturday in his outing at Truist Park against the division-rival Washington Nationals in his team's 2-0 shutout loss. Despite losing his second game of the 2026 season, Holmes made his fantasy managers happy, allowing two earned runs on six hits (two homers) while walking two and striking out a season-high 10 in five innings of work. The 30-year-old veteran allowed two solo home runs to Washington, but otherwise, he was strong, generating 18 swings and misses on 87 total pitches. Since allowing a season-high six runs (five earned) on May 1 against the Colorado Rockies at hitter-friendly Coors Field, Holmes has given up just four earned runs on 12 hits (three homers) while walking seven and fanning 19 in 15 innings in his last three starts. He has gone more than five innings just four times in his 10 starts this year, but Holmes has allowed three or fewer runs in nine of his appearances for Atlanta, and he now holds a 3.78 ERA, 1.29 WHIP, and 48:24 K:BB in 52 1/3 frames. Consider him when looking for a matchup-based streamer down the road.

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Houston Astros first baseman Christian Walker was the team's offense in their 3-0 shutout victory over the Chicago Cubs at Wrigley Field on Saturday, going a perfect 3-for-3 at the plate with two home runs, three RBI, and a walk to raise his season average to .266 and his OPS to .861. Walker hit a two-run home run to get things going in the first frame and later hit a solo homer in the fourth inning for all the runs that Houston would need to finish off the Cubbies. The 35-year-old reached base in all four of his plate appearances on the day. Despite the two-homer performance, Walker has hit just .164 (9-for-55) with four home runs, a double, seven RBI, six runs scored, four walks, and 14 strikeouts in his last 15 games, dating back to May 8. On the year, the right-handed power hitter is slashing .266/.340/.521 with an .860 OPS, 13 long balls, 34 RBI, and 30 runs scored in his 192 at-bats. Hopefully, his two-homer outing on Saturday will get him back on track offensively for an Astros team that really needs him more than ever.

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Kansas City Royals right-hander Stephen Kolek could start to attract some interest on the waiver wire in fantasy baseball leagues after another impressive performance on Saturday in the team's 5-0 shutout over the visiting Seattle Mariners at Kauffman Stadium. Kolek won his third game of the year by throwing a complete-game shutout with four hits allowed, one walk, and two strikeouts to lower his season ERA to an impressive 2.77. It was the 29-year-old's second career shutout, and it was also his second straight scoreless outing after throwing 6 1/3 shutout innings with a walk and three strikeouts in his last appearance on May 17 against the St. Louis Cardinals on the road. Kolek has three quality starts in his four outings for the Royals, going 3-0 with a 2.77 ERA (4.21 FIP), 0.85 WHIP, and 14:5 K:BB in 26 innings pitched. He has been impressive in a small sample size for the Royals, but regression should eventually come, and fantasy managers in mixed leagues should know that the upside is limited, as Kolek has a 16.9% strikeout rate in his career.

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Texas Rangers shortstop Corey Seager (back) was scheduled to face live pitching on Sunday. That session has been postponed due to Seager not quite being where he needed to be in his recovery process. The Rangers are still figuring out the next steps for Seager, but fantasy managers shouldn't expect him back when first eligible. The organization was hopeful that Seager could be back for the upcoming homestand, but that seems doubtful to happen now. Fantasy managers should check back for another update on Seager in the coming days. Ezequiel Duran should continue seeing more at-bats while Seager is sidelined.

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Los Angeles Angels first baseman Nolan Schanuel (calf) was forced to make an early exit from Saturday's game against the Texas Rangers. Schanuel appears to have suffered a calf injury while running the bases during the fifth inning. He was replaced by Vaughn Grissom at first base, who could see an extended look over there if Schanuel misses time. Before leaving Saturday's game, Schanuel was 1-for-3 at the plate with a double and an RBI. Fantasy managers should check back ahead of Sunday's game for another update on Schanuel. The Angels could potentially promote Christian Moore if Schanuel does have an extended absence.

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Texas Rangers third baseman Josh Jung (shoulder) was forced to make an early exit from Saturday's game against the Los Angeles Angels. Jung was pulled out of the game in the fourth inning due to left shoulder soreness. Before exiting, Jung went 0-for-2 at the plate with a strikeout. Ezequiel Duran shifted over to third base and could see increased playing time over there if Jung misses time. The expectation is that Jung will undergo further testing to determine the severity of the injury. For now, fantasy managers should consider Jung as day-to-day.

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St. Louis Cardinals starting pitcher Brycen Mautz will make his MLB debut against the Cincinnati Reds on Sunday. The Cardinals need an extra arm after a doubleheader on Saturday. They've decided to give Mautz the call after he posted solid numbers at Triple-A Memphis this season. Across nine starts, Mautz has a 2.90 ERA, 1.37 WHIP, and a 43:24 K:BB ratio this season. Mautz is a second-round pick of the Cardinals from the 2022 Draft. The expectation is that he'll head back to Triple-A after this outing, but he could be an interesting streaming option for Sunday's slate.

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Minnesota Twins third baseman Royce Lewis has been putting on an impressive power show since being sent down to Triple-A St. Paul. Lewis blasted two home runs on Saturday and has five long balls in five games with St. Paul. It seems that a demotion was exactly what Lewis needed to get his head right. This power surge could be enough to get Lewis back on the Twins roster soon. The potential has always been there with Lewis, but he hasn't been able to put it all together. Lewis could be an interesting stash candidate given his strong performance in Triple-A right now. He could be on the fast track back to the big leagues.

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Boston's 1B Willson Contreras scored 26.0 fantasy points going 9-for-20 with a home run and six RBIs in five games this week. Contreras is owned in 55.9% of mixed leagues.