As a reliever Darwinzon allowed a .393 wOBA to RHH, but it was expected to be .277.
Agaisnt lefties it was .211/.221.
It's the first year he's really struggled. These splits are just overall for the year, they don't take level into account. .449 BAbip vs R explains a lot.
2014
114 PA .255/.381/.287 vs R, .296 BAbip
14 PA .000/.286/.000 vs L, .000 BAbip
2015
234 PA, .199/.289/.238 vs R, .268
45 PA, .389/.511/.500 vs L, .609
2016
156 PA, .205/.355/.320 vs R, .273
68 PA, .241/.353/.276 vs L, .389
2017
332 PA, .251/.345/.376 vs R, .311
117 PA, .134/.276/.196 vs L, .231
2018
331 PA, .225/.347/.297 vs R, .332
140 PA, .216/.374/.279 vs L, .348
2019
236 PA, .290/.444/.459 vs R, .449
176 PA, .119/.284/.210 vs L, .218