Athletics? Giants? 3 Best MLB Free Agent Fits for D-backs RHP Zac Gallen

The dust has mostly settled on the MLB free agent market, but a handful of impactful players are still for the taking, most notably Arizona Diamondbacks right-hander Zac Gallen.

While the 30-year-old Gallen is coming off a 2025 season that saw him post a career-high 4.83 ERA, he has been among the best starting pitchers in the sport for the better part of his MLB career (2019-present) and is a proven top-of-the-rotation force; he can move the needle for a pitching staff that needs a boost.

Here are the top three fits for Gallen should he depart Arizona.

Zac Gallen boasts a career 3.58 ERA (Photo by Sam Hodde/Getty Images)

Since losing Corbin Burnes last offseason, the Orioles have been searching for an ace. Adding Gallen would, at the very least, quell some of the concern about the upper portion of Baltimore's rotation.

Gallen would beef up an Orioles' starting rotation that was 26th in MLB in opponent batting average (.265), 24th in ERA (4.65) and 21st in WHIP (1.32) last season. The right-hander, who leans on his four-seamer and knuckle curve while mixing in a changeup, pitches deep into games and was the ace of Arizona's starting rotation en route to it winning the 2023 National League pennant.

Combine Gallen with left-hander Trevor Rogers, who posted a 1.81 ERA and 5.5 wins above replacement in 18 starts last season, and offseason acquisition Shane Baz, among others, and the Orioles would have a plausible rotation. Plus, with the additions of star first baseman Pete Alonso and outfielder Taylor Ward — who blasted a career-high 36 home runs last season — an improved starting staff gives the Orioles a chance to compete in an ever-improving American League East.

That said, given that Baltimore has already made some