Arizona Diamondbacks manager Torey Lovullo said Tuesday that the team could be without starting pitcher Merrill Kelly (shoulder) for at least a month. Kelly was placed on the injured list earlier in the day with a right shoulder strain. When asked if the 35-year-old would be back by the All-Star break, Lovullo said, "I don't know. Hard to say." This is a big blow to the Diamondbacks and fantasy managers, as Kelly had a 2.19 ERA, 0.93 WHIP, and 22.8% strikeout rate in his first four starts. Tommy Henry figures to slot into the rotation in Kelly's place, but fantasy managers may want to look elsewhere for immediate replacements.

Texas Rangers starting pitcher Jon Gray made a surprise relief appearance in Saturday's loss to the Atlanta Braves, but he's scheduled to take the ball as a starter for Wednesday's game at home versus the division-rival Seattle Mariners. After yielding five runs in his first start of the 2024 regular season, Gray is getting on a roll in April with a 1.10 ERA (2.47 FIP) and 23:7 K:BB over his last 16 1/3 innings (four appearances). The 32-year-old veteran right-hander dominated Seattle a season ago, logging a pristine 0.64 ERA, 0.50 WHIP, and 13:1 K:BB across 14 frames (two starts) against the division foes in 2023. The current M's roster is batting a paltry .159 (14-for-88) against Gray, who looks like a solid streaming option and a worthy pickup during Tuesday night's waiver runs in fantasy ahead of Wednesday's full slate.

Los Angeles Dodgers relief pitcher Blake Treinen (lung) is starting a rehab assignment this week, and he will need three or four outings before he's ready to return to the major-league roster. On the mend from a bruised lung that he sustained on March 9, Treinen should be back to help LA's bullpen by the beginning of May. The 35-year-old veteran right-hander missed most of the 2022 campaign and all of last season following shoulder surgery, and while he'll be in line for the occasional save opportunity based on closer Evan Phillips' availability, Treinen's fantasy value will be more pronounced in leagues that count holds. With right-handers Joe Kelly and Ryan Brasier struggling to begin to 2024 regular season, look for Treinen to become the Dodgers' primary righty setup man before long. In his last full season during 2021, Treinen posted a 1.99 ERA (2.88 FIP), 0.98 WHIP, and 85:25 K:BB over 72 2/3 innings.

Washington Nationals starting pitcher Cade Cavalli (elbow) threw a 60-pitch bullpen session at the team's spring complex in West Palm Beach, Florida on Tuesday, and his velocity reached 96 mph. Cavalli is recovering from last year's Tommy John surgery and isn't expected to be available for the Nats until sometime later this summer, but it's encouraging to hear he's progressing in his throwing program. The 25-year-old former first-round pick is Washington's No. 5 prospect for 2024, per MLB Pipeline, and figures to eventually pick up starts on a rebuilding club and carry some mixed-league fantasy relevance at some point during the second half of the season, but his time may not come until the late stages of the campaign. Dynasty managers should be keeping a closer eye on his status than those in redraft settings.

Chicago Cubs outfielder Cody Bellinger exited Tuesday's game versus the Houston Astros with an apparent injury after crashing into the wall in center field. Bellinger hit the wall hard tracking down a Yainer Diaz double in the fourth inning, and the center fielder was later seen holding his right side in the dugout. Bellinger remained in the game all the way up until the seventh frame before he was removed for Alexander Canario, so his departure could very well be a precautionary measure. The Cubs should provide a clearer picture on the 28-year-old All-Star slugger's health following the contest, and he should be deemed day-to-day ahead of the second game of the series on Wednesday. After clubbing a two-run home run on Tuesday, Bellinger is up to a .226/.320/.440 triple-slash line with five homers, 17 RBI, and 10 runs scored in 84 at-bats (22 games).