Britton (elbow) will start a rehab assignment Wednesday, Meredith Marakovits of YES Network reports.

EDGE Analysis

He won't throw more than 15 pitches Wednesday, but this is the critical final step in his rehab, so Britton remains on track to join the big-league bullpen sometime in early-September. The Yankees' bullpen is currently in flux, as Clay Holmes and Scott Effross are on the injured list while Aroldis Chapman, Lou Trivino and Jonathan Loaisiga jockey for save chances.