Mahle’s slider movement was notably different from last season. Bay Area News Group’s Justice delos Santos reported that Mahle produced eight inches of glove-side movement with the pitch against the A’s, compared with 3.2 inches in 2025. Three of his six sliders produced swing-and-miss, including one strikeout of All-Star Jacob Wilson, while another was a called strike.
While spring results warrant caution, this improvement stands out because it represents a tangible change in a key pitch. A more effective slider can help Mahle miss bats and reduce the chances of hittable contact, addressing a potential source of regression as he moves toward a projected workload of roughly 150–175 innings in 2026.
Last season, Mahle posted strong per-inning numbers with the Rangers—2.18 ERA and a 1.131 WHIP across 86.2 innings in 16 starts—but projections suggest some regression could occur. Baseball-Reference and Fangraphs estimate higher ERAs (3.26 and 4.05, respectively) and slightly higher WHIPs, underscoring the need for reliance on improved stuff to sustain effectiveness.
Mahle’s strikeout rate has declined in recent years (7.1 K/9 in 2024, 6.9 K/9 in 2025), making a sharper, more movement-rich slider valuable for combating lineups and keeping his pitch mix unpredictable. If the slider’s enhanced movement translates to sustained swing-and-miss gains in the regular season, Mahle could help stabilize San Francisco’s late-rotation depth.
Overall, the early signs from Mahle in spring training are encouraging, representing a concrete adjustment that could influence the Giants’ 2026 trajectory. The coming weeks will determine whether the improved slider translates into consistent success over a larger sample size.
