Los Angeles Angels right-handed reliever Robert Stephenson (elbow) said he will have Tommy John surgery with the internal brace on April 30 and he's expecting to have a rehab timeline of 12 to 18 months. The exact nature of his surgery hadn't been revealed until Stephenson talked to the media on Tuesday for the first time since getting injured. We already knew the 31-year-old veteran would miss the rest of 2024, but now we know the exact nature of his surgery. He signed a three-year, $33 million contract with the Halos in January but didn't throw a single pitch in the regular season and also was battling a shoulder injury in spring training. There's no guarantee that Stephenson will be ready to roll for the start of the 2025 campaign.

Los Angeles Angels outfielder Mike Trout is in center field and hitting out of the leadoff spot on Tuesday versus the visiting Baltimore Orioles and right-hander Grayson Rodriguez. It's a notable development, as Trout will be hitting leadoff for the first time since August of 2020. Perhaps it will get the 32-year-old All-Star going, as he's hitting just .111 in his last seven games after a strong start to the season. This setup with Trout at the top of the batting order could continue until third baseman Anthony Rendon (hamstring) returns from a stint on the injured list. Trout's recent slump at the plate has dropped his season slash line to .236/.327/.562 with an .889 OPS, but he's still leading the league with eight home runs while driving in 11 and stealing five bases in 23 games. In six career at-bats against Rodriguez, Trout is hitting .333.

Arizona Diamondbacks rookie infielder Blaze Alexander (hamstring) remains out of the team's starting lineup on Tuesday as they get set to face the St. Louis Cardinals. Alexander injured his right hamstring on Sunday and will miss his second straight game as a result. The 24-year-old was reportedly available off the bench in Monday's game, though, so it doesn't appear to be a serious injury and he should be considered day-to-day. Kevin Newman is starting at the 6 on Tuesday and will hit eighth against Cardinals left-hander Steven Matz. Although Newman has hit .583 with a 1.416 OPS and five RBI in 12 career at-bats against Matz, he'll still be a low-upside DFS sleeper on Tuesday. Alexander has looked great in his first 18 major-league games in 2024, going 17-for-53 (.321) with three home runs, 13 RBI and a steal in his first 58 plate appearances.

Arizona Diamondbacks outfielder Corbin Carroll (rest) is out of the starting lineup ahead of Tuesday's game against the St. Louis Cardinals. This appears to be a routine rest day for the young slugger against left-hander Steven Matz. The 23-year-old is off to a slow start to the season, but fantasy managers shouldn't lose hope. Possibly a rest day will help Carroll get back on track. Randal Grichuk, Jake McCarthy, and Lourdes Gurriel Jr. will cover the outfield during Tuesday's game.

Arizona Diamondbacks starting pitcher Merrill Kelly (shoulder) has been placed on the 15-day injured list on Tuesday. The right-hander is dealing with a shoulder strain, but reportedly won't need surgery, according to manager Torey Lovullo. The D-Backs have not given a timetable on Kelly's possible return to the mound. It sounds like the organization plans to have Kelly undergo further testing before they decide on what to do. Southpaw Tommy Henry has been recalled from the minors and figures to slide into the open spot in the starting rotation.