Diaz's contract was selected by the Mariners and he will be available out of the bullpen against the Rangers on Saturday, Ryan Divish of the Seattle Times reports.
The Mariners' top pitching prospect will likely make his major league debut in the coming days after having his contract selected Saturday, which allowed him to take the spot on the 40-man roster previously occupied by Joel Peralta. "The guy has a chance to be a pretty good reliever. Edwin has plus fastball velocity, plus fastball life and what at times is a plus breaking ball," Mariners general manager Jerry Dipoto said. Diaz will add a power element to the bullpen that has been lacking this season, according to Divish.