Seattle Mariners Midseason Grades: The Relievers

May 30, 2015; Seattle, WA, USA; Seattle Mariners pitcher Charlie Furbush (41) throws out a pitch in the seventh inning against the Cleveland Indians at Safeco Field. Mandatory Credit: Jennifer Buchanan-USA TODAY Sports

Mayckol Guaipe – 4.15 IP, 8.31 ERA, 3.43 FIP, 0.0 WAR

During his brief sint(s) with the Mariners, Guaipe has looked mostly good (save for the one ERA-killing outing). He’s not a future ‘pen ace, but he probably deserves an extended look the rest of the way. He’s earned in, particularly during his dazzling MLB debut in relief of a bombared Felix Hernandez. Grade: C

Vidal Nuno – 12 IP, 3.00 ERA, 3.66 FIP, 0.0 WAR

Nuno is an unamazing swingman who looks like he’s probably done swinging for the time being, in part because the rotation doesn’t need him and in part because his stuff profiles better in relief. He’s been a nice pickup so far, much unlike the nightmarish Mark Trumbo. Still, you’d be forgiven if you hadn’t noticed that he’s been in AAA for a week. Grade: C+

Charlie Furbush – 21.1 IP, 2.08 ERA, 3.68 FIP, 0.1 WAR

The only former bullpen stalwart to not have faceplanted this year, Furbush is really quite the exception to the rule. His strikeouts are down, but it’s okay, he’s been making up for it with other improvements. His spot in the late innings is safe and secure, and not just because the Mariners don’t have any competent competition to pit against him. Grade: B