"Gallen has been a front-of-the-rotation arm at his best. From 2022-23, he posted a 3.04 ERA in 394 innings for the Diamondbacks. He struck out 26.4% of hitters in that span and ranked eighth among qualified starters with a 20.4% K-BB rate. His 9.3 fWAR ranked sixth ahead of Giants ace Logan Webb. Entering his age-28 season in 2024, there was reason to believe Gallen would continue to pitch at his prime level."
"His numbers that year were still solid, if a step down from ace territory. Gallen missed a month with a right hamstring strain but still made 28 starts with a 3.65 ERA. He actually upped his groundball rate from 41.8% in 2023 to 46.2% in 2024. That said, his strikeout and walk rates both trended in the wrong direction, the latter now closer to average after two years of excellent control. Gallen slipped further in 2025."
Many teams added rotation arms this offseason, with some pursuing high-ceiling free agents like Dylan Cease, Ranger Suarez, and Framber Valdez, while others added low-cost depth such as Griffin Canning, Germán Márquez, and Walker Buehler. Starting pitchers remain less volatile than relievers but still suffered injuries and underperformance in 2025. Gallen produced front-of-the-rotation results in 2022-23 with a 3.04 ERA, 26.4% strikeout rate, and 20.4% K-BB rate. He posted a solid but diminished 3.65 ERA in 2024 while increasing groundball rate. In 2025 he logged 192 innings with a 4.83 ERA and a 21.5% strikeout rate, while a 4.28 xERA indicates he was somewhat better than surface results. MLBTR projected a four-year, $80MM contract for him.
Read at MLB Trade Rumors
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