SEATTLE -- D-backs right-hander Zac Gallen was forced to leave Friday night’s 6-1 loss to the Mariners at T-Mobile Park after suffering from tightness in his right hamstring. Gallen allowed single runs in the first and second innings, before settling in and keeping the Mariners in check. After he walked Josh Rojas to lead off the sixth, he threw a 1-1 fastball to Julio Rodríguez that the slugger fouled off. After delivering the pitch, Gallen did a little hop off the mound and motioned for catcher Gabriel Moreno. D-backs manager Torey Lovullo and athletic trainer Max Esposito also came out...