Oakland starters have pitched fewer than five innings in nine of the last 14 games, with the rotation logging just one more inning than the bullpen (65 innings to 64) in that stretch, with the A's going 7-7.
"It's been pretty remarkable to see the innings that they have logged and the zeros that they have put up on the board," manager Bob Melvin said of his middle relieveres. "We feel like we do have a deep bullpen, we have our seventh, eighth, ninth [inning] guys that we rely on, and then we have our unsung heroes."
Melvin has had to depend on a group of bullpen arms led by Jerry Blevins, Pat Neshek, Evan Scribner, Jim Miller and Pedro Figueroa in between the starting rotation and the late-game trio of Sean Doolittle, Grant Balfour and Ryan Cook.
"We feel like we have some depth in our bullpen, and it's been coming into play recently," Melvin said. "You're going to have periods like that and you're going to have games where you'll have to go to the bullpen a little bit earlier, and these guys have been up for it."
The middle relievers have played an especially big role this season for an A's squad with a penchant for comeback and walk-off wins, having won eight games in which they trailed after seven innings as well as a league-best 14 walk-off wins.
"We absolutely feel that if we keep the game close and put up a zero, then we never count our offense out with all our late-game heroics," Blevins said. "As long as we put up a zero, we'll have a chance to win, no matter what."