The Yankees officially placed outfielder Aaron Hicks, starting pitcher Luis Severino and several others on the injured list to start the season.
New York placed six players on the IL, including Dellin Betances (right shoulder impingement), Jacoby Ellsbury (left hip surgery recovery), shortstop Didi Gregorius (Tommy John surgery recovery) and RHP Ben Heller (Tommy John surgery recovery).
Hicks suffered a lower back injury and has not yet started baseball activities. He has been out since March 2, and manager Aaron Boone said he does not have a definitive timetable for Hicks' return.
Severino, meanwhile, has been dealing with right shoulder inflammation but resumed throwing last week since being shut down on March 5.
Both Hicks and Severino signed contract extensions with the team in spring training: Hicks a seven-year, $70 million deal, Severino a four-year, $40 million contract.
All the injuries are retroactive to March 25.
LHP CC Sabathia will also begin serving his five-game suspension stemming from a HBP in a September 2018 game against the Tampa Bay Rays.