The Red Sox transferred Casas (knee) to the 60-day injured list Saturday.

Casas underwent surgery in early May to repair the ruptured patellar tendon in his left knee and will aim to return in 2026. The move corresponds with the Red Sox selecting Marcelo Mayer's contract from Triple-A Worcester while placing Alex Bregman (quad) on the 10-day injured list.

Contreras (back) isn't in the lineup for Saturday's game against Arizona.

Contreras was a late scratch from Friday's lineup due to back spasms, and he'll need at least another day to recover. Alec Burleson will fill in for him at first base and bat fifth.

Eldridge is slashing .304/.379/.533 with 15 RBI, 12 runs scored, six doubles, five home runs and a 27.2 percent strikeout rate across 103 plate appearances for Double-A Richmond this season.

Eldridge is in the midst of a four-game hitting streak and has notched at least one hit in 15 of his 19 appearances this month. The 20-year-old first baseman has been productive in May, slashing .338/.397/.577 with 12 RBI, nine runs scored, four homers and a 23.1 percent strikeout rate. The 16th overall pick in the 2023 First-Year Player Draft, Eldridge could soon make a case for a promotion to Triple-A Sacramento, where he finished the 2024 campaign.

Sogard will start at third base in the afternoon game of Saturday's doubleheader against the Orioles, Christopher Smith of MassLive.com reports.

Sogard steps in for Alex Bregman, who was removed from Friday's contest with right quad tightness. It's unclear if Bregman could be available for the second game of the doubleheader, or if manager Alex Cora will make do with Sogard or another body.

Burger went 1-for-4 with a double and an RBI in Friday's 4-1 loss to the White Sox.

Burger continued a revival since being called up from a brief stay in the minors. He's hit safely in nine of 11 games since returning the majors, going 12-for-40 (.300) with three doubles, three home runs and seven RBI. Unfortunately for the Rangers, the offense was dormant once again, managing just three hits. Burger, who's spent much of his time in the lower half of the batting order, has been moved up to fourth and fifth the last two games.

Black (hand) has made six appearances in the rookie-level Arizona Complex League during his rehab assignment, going 7-for-18 with two doubles, one triple, four walks, three RBI and three runs.

After falling short in his bid for a spot on the Brewers' Opening Day roster and being optioned to Triple-A Nashville on March 22, Black ended up beginning the season on Nashville's injured list due to a hamate fracture in his right hand. He underwent surgery and missed about six weeks of action before kicking off his rehab assignment in Arizona on May 15. He's expected to be activated from Nashville's IL early next week, according to MLB.com.

Santana went 1-for-4 with an RBI in Friday's 3-1 win over Detroit.

Santana delivered a two-out, run-scoring single in the first inning that turned out to be the game-winning hit. He's knocked in at lease one run in five consecutive games and has eight RBI over the last seven. After driving in seven runs over his first 29 contests, the veteran slugger has accumulated 20 RBI over his last 19 games.

Mead went 1-for-3 with a solo home run in Friday's 3-1 win over the Blue Jays.

Getting the start at first base and batting eighth, the 24-year-old drove a cutter from lefty Eric Lauer down the left-field line in the fourth inning. Mead only has two homers on the season, but they've come in the last two games, and he has a six-game hitting streak going sandwiched around an eight-game stretch in which he didn't get off the bench, as the Rays faced nothing but right-handed starters. Despite being limited primarily to a short-side platoon role, Mead is finding his rhythm at the plate, and since the beginning of May he's slashing .286/.342/.486 in 38 plate appearances.

Steer went 3-for-5 with a double, an RBI and a run scored in Friday's 13-6 loss to the Cubs.

Steer finished the Reds' three-run first inning when he doubled in a run. The two-bagger extended his hitting streak to 11 games, during which Steer's batting .359 (14-for-39) with five doubles, a home run and two RBI. He's had a season of peaks and valleys thus far and is batting just .225 with four home runs, 13 RBI and 23 runs through 45 games this season.

Kurtz went 1-for-3 with a three-run home run and a walk in Friday's 4-3 loss to the Phillies.

Kurtz made things interesting in this contest, as he got the Athletics to within a run after taking Jordan Romano deep in the ninth inning. This was Kurtz's fourth homer over the last four games, a span in which he has gone 5-for-14 with eight RBI and three walks. The first baseman is up to .231/.291/.440 slash line, five homers, 14 RBI, 10 runs scored and no stolen bases over 103 plate appearances. He looks to be past a slump from the middle of the month, and the power that has helped him take the fast track to the majors hasn't taken long to show up at baseball's highest level.