5 pitchers who made clear improvements with NY Mets under Jeremy Hefner

2. Griffin Canning – Embracing Analytics

Griffin Canning arrived in New York at age 29 after a five-year stint with the Angels, bringing with him a career record of 25-34. Jeremy Hefner helped Canning focus on his strengths, particularly his slider, and developing a more confident and strategic approach on the mound. Hefner has emphasized the importance of relying on his best pitches and using a more proactive approach against all hitters.  Canning had struggled through a challenging 2024 season with the Los Angeles Angels, where he posted a 5.19 ERA. He signed a one-year, $4.25 million deal with the Mets. This move was influenced by the team's advanced use of pitch technology.

Hefner has made significant adjustments to Canning‘s pitching arsenal, including the addition of the afore mentioned kick change, a changeup-splitter hybrid pitch that has gained popularity among Mets pitchers. This pitch has been instrumental in Canning's improved performance, contributing to his 5-1 record in the early part of the season.

Jeremy Hefner has significantly improved Griffin Canning's performance on the mound. He has emphasized the importance of relying on his best pitches and using his strengths. Canning has begun leaning more heavily on his slider and developing a more confident and strategic approach on the mound. This more proactive approach against hitters has made an important contribution to Canning’s success. 

Griffin Canning's resurgence with the New York Mets in the 2025 MLB season is a testament to the collaborative efforts between he and his pitching coach. Canning's success in refining his delivery and incorporating new pitches emphasizes the importance of a knowledgeable staff in translating data into actionable feedback. It is a testament to the positive impact of Jeremy Hefner's coaching and the Mets' pitching program.