Closer look: Super duo resides in AL Central

In an era of super bullpens, one of the best late-inning duos in baseball can be found within the American League Central.

As much attention is paid to the Indians' deep starting rotation, the reigning division champions have also been able to shorten games with closer Cody Allen and relief ace Andrew Miller covering critical outs. Through their first 21 combined innings this season, Allen and Miller had allowed precisely zero runs.

"People don't see behind the scenes how hard they work, preparing and everything like that," Indians manager Terry Francona said. "Andrew, everybody knows what he's done. But Cody, for the last six years here, he's been about as reliable a reliever as anybody in…