Dave Valle made his Major League debut in 1984 with the Seattle Mariners, and he would play for the M's infrequently over the next three seasons before he would play the lion's share at Catcher in 1987.    

From Canada, James Paxton was a fourth round pick who would play collegiately at the University of Kentucky.  Paxton debuted in 2013 and had four starts, winning three of them.  Over the next three seasons, Paxton was often on the disabled list, and he had a pedestrian 15-15 record, but by 2017, he was healthy and was able to show what he could do.

Omar Vizquel is not primarily associated with the Seattle Mariners, but the player who would become one of the best defensive infielders ever would begin his career in the Pacific Northwest.