13.78
It's one of the most surprising numbers associated with the Pirates bullpen this season. That's the K/9 rate of 35-year-old set-up man Jason Grilli, fourth best among all qualified relievers in MLB. His other numbers are pretty great, too: a 2.20 ERA, a 1.00 WHIP, a .180 BA against and a 4.41 K/BB ratio. He's been a 1.2 WAR player. By comparison, NL saves leader Joel Hanrahan has a WAR of 0.2.
There's no question Grilli has been a key cog in one of the National League's best bullpens. He has nailed down an 8th-inning role that was in flux for much of last season. The Pirates have lost only one game this season when leading after seven innings, a .984 winning percentage. There's a reason why fans clamor for Grilli to enter the game in any high-leverage situation. It's not a stretch to say he's the best set-up man in the league.
If the Pirates are going to make the playoffs, it's going to be on the back of their bullpen. Look at last night's game against the Cardinals, for example. If you get the game to the bullpen with a lead after six innings, the guys in the 'pen will take care of the rest. The Pirates trail only Cincinnati in terms of bullpen ERA this season. And the key to the pen, the stabilizing factor between the starters and the closer, has been Grilli.
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