Diamondbacks' Zac Gallen: Diagnosed with hamstring strain

Gallen was removed from Thursday's start against the Mets with a right hamstring strain, Jesse Friedman of GoPHNX.com reports.

Gallen left Thursday's start with trainers after giving up one hit and throwing only six pitches, as he aggravated a hamstring injury that originally popped up April 26. An exact return timeline is unclear, but he'll almost certainly miss at least one start and is likely to end up on the injured list.