Addressing the Pitching Crisis

The Guardians-0.html target=_blank class=infotextkey>Cleveland Guardians have strengthened their struggling rotation by claiming left-handed reliever Matt Krook off waivers from the Oakland Athletics. This move comes amid the team’s efforts to recover from the loss of Ben Lively, who will miss the remainder of the 2025 Season following Tommy John surgery. Lively’s absence exacerbates an already fragile pitching staff, with ace Shane Bieber (UCL surgery) sidelined since early April.

The Impact of Lively’s injury

Lively, acquired in 2023 as a swingman, had become a critical starter this season with a 3.91 ERA in 10 starts before his injury. His 12–16 month recovery timeline forces Cleveland to seek immediate solutions in a crowded AL Central division race.

Introducing Matt Krook

The 30-year-old Matt Krook spent the first half of 2025 in Triple-A Las Vegas (A’s affiliate), posting a 3.21 ERA and 21 strikeouts in 14 innings. His sinker (92 mph) generates weak contact, while his slider and cutter offer above-average swing-and-miss potential. However, a career minor league walk rate of 15% remains a concern that must improve for sustained MLB success.

Strategic Role in Cleveland’s Staff

Manager Stephen Vogt plans to deploy Krook as a multi-inning reliever or spot starter, leveraging his flexibility. The Guardians’ defensive strengths align with Krook’s groundball-heavy approach (65% groundball rate in Triple-A), as noted by team president Chris Antonetti:

“His ability to limit hard contact makes him a strategic fit. Command improvements will be key, but his track record justifies the move.”

Short-Term Challenges

Krook has been optioned to Triple-A Columbus to refine his control. His potential success could mirror that of fellow lefty Tim Herrin, who boasts a 3.55 ERA in 2025. With the trade deadline approaching, Cleveland remains open to further upgrades but views Krook as a low-risk addition to their depth.

Looking Ahead

While Krook’s immediate impact may be limited, his sinker-centric approach addresses a critical need. Antonetti emphasized resilience amid injuries: “Depth is tested every season. We’re confident Matt’s skill set can help us navigate this challenge.”

Cleveland (25–17, 2nd in AL Central) now shifts focus to stabilizing their rotation ahead of a pivotal stretch against division rivals like the Detroit Tigers.