Baltimore Orioles rookie outfielder Heston Kjerstad will make his MLB debut against the Los Angeles Angels on Tuesday. The rookie outfielder is in right field and batting eighth during his O's debut. It's nice to see the O's giving Kjerstad a legitimate look after he tore the cover off the ball in Triple-A. Kjerstad hit 10 home runs with 30 RBI in 21 games before his promotion. He should be a strong fantasy contributor as long as he gets regular at-bats in Baltimore.

The Chicago Cubs designated outfielder Garrett Cooper for assignment on Tuesday, according to a source. Cooper wasn't exactly slumping at the plate, but the Cubs think he's expendable in order to bring up first base prospect Matt Mervis as another right-handed bat. The 33-year-old Cooper was hitting .270/.341/.432 with a home run, double, triple, six RBI and three runs scored in 41 trips to the plate and 12 games for the Cubs before getting DFA'd. He had walked four times and struck out 13 times. For now, Mervis is likely to see most of his time as the team's designated hitter, at least until outfielder Seiya Suzuki (oblique) is able to return from the injured list. Mervis is worth a pickup in NL-only leagues for now.

Chicago Cubs first base prospect Matt Mervis was called up from Triple-A Iowa on Tuesday and is serving as the designated hitter and batting eighth in his season debut for the Cubs against the Houston Astros and right-hander J.P. France. The Cubs' No. 13 prospect, per MLB Pipeline, could see regular playing time at DH in Chicago, at least until outfielder Seiya Suzuki (oblique) returns from the injured list. The 26-year-old Mervis was taken in the 39th round by the Washington Nationals in 2016. He hit .167 (15-for-90) with three home runs and 11 RBI in his first 27 major-league games in 2023 and had gone 19-for-66 (.288) with five homers and 13 RBI in 18 games for Iowa this year before his call-up. Mervis is hitless in his two career at-bats against France.

Chicago Cubs outfielder Ian Happ (hamstring) is back in left field and is hitting second for the Cubs on Tuesday against the visiting Houston Astros and right-hander J.P. France. Happ tweaked his hamstring last Friday and sat out Saturday and Sunday. But after the team's scheduled off day on Monday, the 29-year-old switch-hitter is ready to return to Chicago's starting lineup. Happ will be looking to bust out of a recent slump that has seen him record just four hits in his last 35 at-bats now that he's healthy again. Overall this year, he's hitting .240/.352/.360 with a home run, 12 RBI and 14 runs scored in his first 75 at-bats. In his two career at-bats against France, Happ has two hits and an RBI.

Chicago Cubs left-hander Justin Steele (hamstring) went through some fielding practice on Tuesday before the team's game against the visiting Houston Astros. Steele suffered his strained left hamstring while fielding a ball on Opening Day before landing on the injured list, so the Cubs want to make sure he's good before he throws in an extended spring training game this Friday. The 28-year-old will return to a spot in Chicago's rotation, but he's going to need at least a short minor-league rehab assignment before that happens. Steele is worth stashing in an injured-list spot in most fantasy leagues after going 16-5 with a career-best 3.06 ERA and 1.17 WHIP with 36 walks and a career-high 176 strikeouts in 173 1/3 innings in 30 starts for the Cubbies in 2023.