Weber's contract was selected from Triple-A Tacoma and he will start Saturday's game against the Blue Jays.
The Mariners' rotation has been decimated by injuries, with their four best starting pitchers all currently on the disabled list. Weber posted a 0.85 ERA (3.42 FIP), 0.76 WHIP and 19:4 K:BB over 31.2 innings for Tacoma prior to the promotion. While his ratios are impressive, he does not miss enough bats to project as a viable long-term option against big-league hitters. He has a career 5.15 ERA and 15.8 percent strikeout rate in 64.2 MLB innings.