Manager Luis Rojas declined to commit to Diaz as the team's closer Sunday and said, "I don't know yet. We'll get there at some point," Anthony DiComo of MLB.com reports.
Rojas brought up Diaz, Dellin Betances, Seth Lugo and Jeurys Familia as potential options for the ninth inning, and he also floated the possibility of utilizing a committee approach. Diaz should remain the favorite given his pedigree and what the team gave up to acquire him, but his 2019 struggles (5.59 ERA and 1.38 WHIP while blowing seven of 33 save chances) are unlikely to be forgotten quickly.