Diamondbacks' Zac Gallen: Exits with trainer

Gallen was removed from Friday's game against the Mariners due to right hamstring tightness, Nick Piecoro of The Arizona Republic reports.

It's not immediately apparent how severe Gallen's injury is, but the Diamondbacks should offer more information following Friday's contest. The 28-year-old right-hander was able to get through five frames Friday while surrendering three earned runs on three hits and a walk, striking out three batters.