The Opener: Kirby, Perez, Heim

Here are three things we’ll be keeping an eye on around the baseball world throughout the day:

1. Kirby to make season debut:

The Mariners have been without star right-hander George Kirby all season due to shoulder inflammation. While a strong start from the club’s offense has been enough to propel them to the AL West lead with a 28-20 record, the return for an All-Star who sports a career 3.43 ERA and 3.22 FIP only further brightens the outlook. Kirby has been a workhorse by the standards of today’s game, throwing more than 190 innings in each of the last two seasons. That streak will end this year after the first significant absence of his young career, but the 27-year-old still figures to offer the Mariners stability at the top of their rotation. His first task will be facing the Astros and right-hander Lance McCullers Jr. tonight. McCullers recently came off the IL himself but has struggled to a 7.88 ERA through three starts since his return.

2. Perez nearing milestone:

Veteran Royals catcher Salvador Perez has had a rough start to the 2025 season despite some positive signs in the underlying metrics. For however lackluster his season-long numbers may appear so far, the 35-year-old was brilliant during yesterday’s game in San Francisco when he collected three hits, including a double and a homer. That double is of particular note because it was the 299th of his career. His next two-bagger will make him just the sixth player in Royals history to reach 300 with the club, joining George Brett, Hal McRae, Frank White, Amos Otis, and his own former teammate Alex Gordon. Perez is also within spitting distance of 300 career home runs, a club he’d be the second Royal in history to join behind Brett. At 276 dingers for his career, it’ll be a bit longer before he reaches that milestone, however.

3. Heim dealing with hand injury:

The Rangers had an injury scare last night when catcher Jonah Heim exited yesterday’s game due to a compressed nerve in his right hand. As noted by Bill Ladson of MLB.com, Heim struggled with throwing the ball back to righty Jacob deGrom as the veteran warmed up on the mound, prompting the club to swap him out with Tucker Barnhart for the day. Ladson adds that according to Bochy, x-rays on Heim’s hand came back negative. That led to optimism from the veteran manager that Heim could be back in the lineup soon, which would be a major relief for the Rangers given the 29-year-old’s strong .268/.314/.433 slash (111 wRC+) from the catcher position this year. The Rangers can afford to play it somewhat safe with Heim in the coming days, given that both Barnhart and Kyle Higashioka are currently on the roster as catching options.