Joe Saunders
Bantz was called up to the majors for the first time on June 5, 2013. Bantz appeared in one game for the Mariners, starting at catcher in his only appearance. At the plate, he faced Andy Pettitte twice, grounding out once and striking out once before Endy Chávez replaced him as a pinch hitter in the eighth inning. Behind the plate, he caught Joe Saunders, Danny Farquhar and Óliver Pérez. He allowed stolen bases to Robinson Canó and Jayson Nix.