Gallen posted a 4.83 ERA, 21.5% strikeout rate, and 8.1% walk rate over 192 innings in 2025, with the ERA and K% both standing out as career worsts. The good news for Gallen is that he seemed to get on track over the season’s final two months. For instance, a reunion with Merrill Kelly has been speculated on basically ever since Kelly was traded to the Rangers at the deadline. Kelly was open about his desire to stay in Arizona both before and after the trade, and Kelly would be available at a lower price than Gallen given their ages (Kelly turns 37 in a couple of weeks, and Gallen turned 30 last month). Gambadoro feels the Diamondbacks will pursue one of Gallen or Kelly but not both, leaving one rotation spot open for a younger pitcher until Corbin Burnes is ready to return from Tommy John surgery.