Oakland Athletics second baseman Zack Gelof (oblique) returned to baseball activities on May 1 by taking grounders at second bae and playing catch before a game against the Pittsburgh Pirates. He has also resumed taking light swings in the cage, but there remains no timeline for Gelof to begin a minor-league rehab assignment, as the A's don't want to rush him back and have him potentially aggravate his oblique injury. Oblique injuries are notoriously tough to return from, so the 24-year-old is going to be brought along slowly in his rehab. With Gelof out, Abraham Toro has capitalized with frequent playing time at the keystone. Gelof, the former second-rounder in 2021 out of Virginia, impressed in his major-league debut last year but was hitting just .196 (18-for-92) with three home runs, seven RBI and four steals at the time of his injury.

Milwaukee Brewers third base prospect Brock WIlken (facial) recently returned from an early-season facial fracture injury this past week. Earlier in April, Wilken took a fastball to the face but thankfully did not suffer any loss of vision or concussion as a result. The 21-year-old returned to Double-A on May 4 and tallied a double. Wilken, who was a first-round selection in the 2023 MLB Draft, has not logged many games in the minor leagues but hopes to get himself back on track now that he is fully healthy. Wilken showcased his raw power potential in a limited opportunity with Double-A last season by launching two long balls in just six games. The sixth-ranked prospect in the Milwaukee system should be expected to reach the major leagues sometime next season.

Kansas City Royals right-hander Alec Marsh (elbow) looked good in his minor-league rehab start for Triple-A Omaha on Sunday, tossing four shutout innings while allowing one hit, walking one and striking out six. The Royals were hoping that Marsh threw 60 to 65 pitches in the outing, but he pitched so well and efficiently that he only threw 53 pitches (38 for strikes). The 25-year-old could be ready to return from the 15-day injured list when he's eligible on Friday, but if the Royals play it safe and have him make another rehab start, Daniel Lynch would be in line to take another turn through KC's rotation. Marsh was looking good before landing on the IL, going 3-0 with a 2.70 ERA and 1.01 WHIP with 17 strikeouts and seven walks in 26 2/3 innings pitched, so he'll be guaranteed a spot back in the team's rotation when he's ready.

Philadelphia Phillies third base/shortstop prospect Aidan Miller has been off to an incredible start in his first full professional season at Single-A. Miller has a .310/.375/.479 slash line with two home runs, eight swiped bags, and a 7:14 BB:K. The former first-round pick in the 2023 MLB draft has dominated Single-A pitching and could find himself in High-A fairly soon. Even though Miller is still several years away from the major leagues, dynasty managers should pay close attention to him due to his elite combination of power and speed, as he can develop into one of the game's budding superstars.

New York Yankees infielder Oswald Peraza (shoulder) is scheduled to begin a minor-league rehab assignment on Tuesday night with Single-A Tampa. Peraza hasn't played at all this year after suffering a right-shoulder strain in spring training in late February. The 23-year-old is probably going to require a lengthy stint in the minor leagues before the Yankees consider adding him to the major-league roster. If he's able to return before DJ LeMahieu (foot) does, the 23-year-old infielder could see playing time at the hot corner in the Bronx. Peraza performed well in the minors last year but struggled in 52 contests at the big-league level, slashing .191/.267/.272 with two home runs, 14 RBI and four stolen bases in 191 plate appearances. When the entire Yankees roster is healthy, Peraza profiles as a utility infielder.