The Pirates reinstated Horwitz (wrist) from the injured list Saturday, Colin Beazley of the Pittsburgh Post-Gazette reports.

Horwitz has been on the injured list all season while working his way back from a thumb procedure he underwent in February to relieve some pain in his right wrist. He's been playing in rehab games since late April and has slashed .255/.294/.383 with two RBI and seven runs scored across 51 plate appearances. Now fully healthy, he's expected to take over as Pittsburgh's primary first baseman. Matt Gorski was optioned to Triple-A Indianapolis in a corresponding move.

Naylor isn't in the lineup for Saturday's game against the Rockies.

Naylor will get a chance to catch his breath Saturday after logging three consecutive multi-hit games. Pavin Smith will fill the void at first base while Ketel Marte serves as the DH, opening up second base for Jordan Lawlar.

Mountcastle isn't part of the Orioles' lineup for Saturday's game against the Nationals, Roch Kubatko of MASNSports.com reports.

Mountcastle will get a much-deserved rest day Saturday, taking a seat for the first time in 18 games. Ryan O'Hearn will fill in at first base, while Adley Rutschman slides to DH and Maverick Handley slots in behind the plate. Mountcastle's 11-game hit streak will be preserved unless he enters off the bench.

Lowe went 1-for-4 with a solo home run in Friday's win over the Orioles.

The first baseman got the Nats on the board by depositing a Cade Povich sweeper over the right-field fence in the second inning. It was Lowe's eighth homer of the season, but he's been struggling to produce in May -- over his last nine games, he's gone just 3-for-33 (.091).

Solak went 1-for-3 against the Phillies on Friday.

Solak made his first big-league appearance since 2022 and singled to left field in his first at-bat. He started at first base, but Spencer Horwitz (wrist) is expected back at some point during the team's weekend series. However, Solak is also capable of playing nearly every defensive position, so he could settle into a utility role if he sticks in the majors.

Sogard started at first base and went 2-for-3 in Friday's 4-2 loss to Atlanta.

Sogard made his fifth start in the last six games and is 6-for-21 since his call-up from Triple-A Worcester. He's been seeing time at first base since Triston Casas suffered a season-ending knee injury, but considering the recent news that Kristian Campbell is taking reps at first base, per Chris Cotillo of MassLive.com, Sogard could see his window of playing time close in the near future.

Arraez went 3-for-4 with a double in Friday's 5-1 loss to the Mariners.

The Padres managed only eight hits in total, while the three batters behind Arraez in the order went a combined 0-for-11, so the 28-year-old's knocks didn't lead to any offense. Arraez is finding his groove in May, recording four three-hit performances in 13 games while producing a .298/.333/.368 slash line with six RBI and nine runs.

Walker went 2-for-4 with a walk and a three-run home run in Friday's 6-3 win over the Rangers.

The first baseman put an exclamation point on a six-run rally by Houston in the seventh inning when he crushed a Shawn Armstrong fastball 410 feet to left-center field. Walker snapped an 0-for-16 mini-slump with the performance, while the long ball ended a 15-game homerless drought. The 34-year-old has yet to build much momentum to begin his tenure as an Astro, and through 180 plate appearances he's slashing just .210/.283/.358 with five homers, 18 RBI and 19 runs.

Naylor went 2-for-4 with a stolen base and a run scored in Friday's 8-0 win over the Rockies.

Naylor is now on an eight-game hitting streak, and the last three have been multi-hit efforts. He's 11-for-34 (.324) during the streak, adding three extra-base hits, four RBI and two steals. The first baseman has been at his best to begin his first season with Arizona, offering a high batting average with modest pop and some surprising speed. He's slashing .304/.370/.458 with eight steals, five home runs, 27 RBI, 23 runs scored and 11 doubles across 44 contests.

Contreras went 2-for-5 with two doubles, an RBI and three runs scored in Friday's 10-4 win over the Royals.

It was the sixth multi-hit showing of the month already for Contreras, who extended his on-base streak to 15 games in the process. During this streak, the veteran slugger is batting .365 (19-for-52) with four home runs, four doubles, 17 RBI and 12 runs scored. After moving away from the catcher position to first base for the Cardinals in 2025, Contreras has been able to appear in 44 of St. Louis' 45 games so far.