The Opener: Kurtz, Puk, Seager, Leclerc

As the 2025 regular season continues, here are three things we’ll be keeping an eye on around the baseball world throughout the day today:

1. Kurtz to make MLB debut:

It’s an exciting day for fans of the Athletics. Top first base prospect Nick Kurtz is poised to make his big league debut during tonight’s game against the Rangers, scheduled for 7:05pm local time. Kurtz, 22, was the club’s first round pick, No. 4 overall, in last year’s draft and has done nothing but rake in pro ball. Though he has just 32 minor league games under his belt, he’s hit an incredible .336/.432/.689 in that time. That production follows a remarkable career at Wake Forest, where he batted .333/.510/.725 in his three seasons with the Demon Deacons.

Now, Kurtz will get the opportunity to prove himself in the majors for an A’s team that has stumbled out the gate to a 10-13 record but already has plenty of exciting offensive talent. Kurtz needs to be added to the 40-man roster today, although the club already has a vacancy so only a corresponding active roster move will be necessary to add him to the mix. With Kurtz bursting onto the scene at first base, the A’s will give breakout slugger Tyler Soderstrom and designated hitter Brent Rooker time in the corner outfield to get the trio of sluggers into the lineup.

2. Puk seeking additional opinions:

Diamondbacks southpaw got an MRI on his ailing elbow yesterday, and the news on that front appears to be worrisome. While manager Torey Lovullo didn’t give much of a concrete update to reporters, he did note that Puk is seeking additional opinions (link via Nick Piecoro of The Arizona Republic). That’s a foreboding update given that Puk is dealing with elbow inflammation. Acquired at the 2024 trade deadline, Puk has given the D-backs a sensational 1.78 ERA in 35 1/3 innings dating back to last July. The former No. 6 overall pick has fanned 40% of his opponents with the Snakes against a 5.1% walk rate. Jalen Beeks is the only lefty in the Arizona pen at the moment with Puk out of commission, though both Joe Mantiply and Kyle Nelson are in the mix as depth options at Triple-A.

3. Seager, Leclerc undergoing testing:

A pair of notable injuries occurred during yesterday’s game between the Rangers and Athletics. Texas shortstop Corey Seager exited early with tightness in his right hamstring, while A’s right-hander Jose Leclerc exited after just seven pitches due to shoulder soreness. Rangers manager Bruce Bochy told reporters (including Shawn McFarland of the Dallas Morning News), that Seager is set to undergo an MRI to determine the severity of his hamstring ailment. The news appears more worrisome for Leclerc. A’s skipper Mark Kotsay told reporters (including MLB.com’s Martin Gallegos) that while the righty is set to undergo additional testing, the injury seems to be “more of a strain than soreness.” 

An injured list stint for their player would be a frustrating development for both clubs; Seager has been the Rangers’ best player since signing a ten-year, $325MM contract prior to the 2022 season. If he needs an IL stint, the Rangers would likely bring utilityman Ezequiel Duran back into the fold after recently optioning him to Triple-A.

Leclerc, meanwhile, was signed to a hefty one-year deal ($10MM) to serve as star closer Mason Miller’s primary set-up man. That hasn’t come to fruition early in the year, though perhaps some of Leclerc’s struggles — six runs on 13 hits and five walks in nine innings — can be attributed to this shoulder injury. The right-hander’s average fastball is sitting at a career-low 94.2 mph — down 1.1 mph from 2024 and down 2.6 mph from its peak.