Gomber is on the minor-league DL at Double-A Springfield with an undisclosed injury.
He lasted just three innings in his last start on May 24 despite giving up just one run and striking out four, so he likely suffered the injury in that outing. Gomber, who profiles as a back-end starter or middle reliever, had notched a 4.08 ERA, 1.54 WHIP and 40:20 K:BB in 39.2 innings prior to suffering the injury.