Oakland Athletics infielder Aledmys Diaz (calf) has resumed taking batting practice. He has not started running the bases yet, but manager Mark Kotsay said that once Diaz does so without issue, he could be ready to go on a minor-league rehab assignment. The 33-year-old veteran utility man is slowly making progress but is probably still a month away from being able to make his 2024 debut with the A's. The Cuban infielder won't be guaranteed playing time when he's able to return, though, after disappointing with a .229/.280/.337 slash line in his first year with the team in 2023 in 109 games. Even if Diaz does find regular playing time when he's healthy, he'll have a low ceiling with minimal power and speed. Diaz hasn't hit more than 18 home runs in a single season in his eight-year big-league career.

Oakland Athletics left-hander Ken Waldichuk (elbow) had a setback after he faced hitters in a 25-pitch live batting practice session on April 29 and has not thrown since. Waldichuk will be re-evaluated in the next week and is shut down indefinitely. The 26-year-old southpaw opened the year on the 60-day injured list while recovering from a left-elbow sprain, but this recent setback is going to keep him out at least into June. He's merely a name to monitor in AL-only leagues while he works to get healthy. Waldichuk won't be a lock for the big-league rotation when he's finally healthy, either, after going 4-9 with a 5.36 ERA (5.30 FIP) and 1.56 WHIP with 71 walks and 132 K's in 141 innings over 35 outings (22 starts) last year. A relief role is probably his best path to work in the majors if he can eventually make it back before the All-Star break.

Oakland Athletics right-hander Luis Medina (knee) faced hitters in a 20-pitch live bullpen session at the Coliseum on Monday and came away from it feeling healthy. Medina will next head to the team's minor-league complex in Arizona and throw a simulated game on Friday. If that goes well, he could start a minor-league rehab assignment soon after that. The 25-year-old Dominican hurler is recovering from a Grade 2 MCL sprain and has yet to pitch in the big leagues at all in 2024. He made his major-league debut with the A's last year and went 3-10 with a 5.42 ERA (4.76 FIP) and 1.51 WHIP with 57 walks and 106 strikeouts in 109 2/3 innings over 23 outings (17 starts) in his rookie season. Medina has a live arm and had some decent stretches in 2023, but he's going to need to show better control when he's back healthy if he wants a chance at a rotation spot.

Oakland Athletics left-hander Scott Alexander (rib) gave up a run on two hits while striking out one in an inning of work in his first minor-league rehab appearance for Single-A Stockton last Friday. Alexander said he felt good in his first rehab outing and was scheduled to make another appearance in San Jose on Tuesday, also with Stockton. If he comes out of that outing without a setback, Alexander will move his rehab assignment to Triple-A Las Vegas. Now that the 34-year-old veteran southpaw is pitching again for the first time in almost two months, he could be a candidate to return to Oakland's bullpen soon. Alexander hasn't pitched yet in 2024 with the A's and is unlikely to be of much use in any fantasy format once he's back in the big leagues.

Oakland Athletics outfielder Miguel Andujar (knee), who had surgery to fix a torn meniscus in his right knee on March 27, resumed taking batting practice, but manager Mark Kotsay said on Sunday that the outfielder is experiencing lateral knee soreness, a "slight setback" that will slow his progress. Andujar was originally given a recovery timeline of at least four to six week. He's expected to join the big-league club after he goes on a minor-league rehab assignment. Given the nature of the 29-year-old's injury and his long layoff, it wouldn't be a surprise if he wasn't able to return to the A's until June. It remains to be seen what role Andujar will have once he makes his 2024 MLB debut. He's a name worth monitoring in AL-only formats once he gets closer to a return.