Isaiah Campbell: Everything you need to know

The Diamondbacks reassigned Campbell to minor-league camp Thursday, Alex D'Agostino of SI.com reports. Plenty of spots in Arizona's Opening Day bullpen were up for grabs in spring training, but Campbell was unable to seize one despite allowing just two baserunners over five innings across six Cactus League appearances. Campbell saw big-league action in each of the past three seasons but is slated to begin the 2026 campaign at Triple-A Reno.

The Diamondbacks signed Campbell to a minor-league contract Dec. 5. In parts of three seasons in the majors, Campbell has collected a 5.65 ERA and 42:16 K:BB over 43 innings. The 28-year-old reliever will give the Diamondbacks some experienced bullpen depth at Triple-A Reno in 2026.

The Red Sox outrighted Campbell to Triple-A Worcester on Thursday. Campbell has been torched for 19 runs (18 earned) over 14.1 innings over the last two seasons during his brief time with the Red Sox. He's no longer on the 40-man roster but will remain in the organization for the time being.