I see a calmer, cooler version of Keller from hereon out. 339 BABIP, there’s no way that luck can be sustained. 388 batting average on balls put in play against him, and while this year he’s saddled with a. Keller has registered a much more respectable 4.48 FIP and 4.49 xFIP, helping also account for the poor luck he’s dealt with since last year. Besides, the former second-round draft pick wasn’t even as horrid as his 6.05 ERA suggests.