Both roster decisions seem like savvy and the correct ones as the Yankees placed Chapman on the 10-day disabled list on Sunday with left shoulder rotator cuff inflammation.
The Yankees recalled Chad Green from Triple-A Scranton/Wilkes-Barre to replace Chapman in the bullpen.
Chapman had a MRI on Saturday, a day after getting just two outs and giving up a run in the ninth inning of a 5-1 loss to Houston.
Chapman told reporters that discomfort started in an appearance against Boston last month. Last Sunday, he blew a three-run lead in the ninth inning against the Chicago Cubs that ended up in an 18-inning win for the Yankees. Chapman exited the game in the middle of the inning while being tended to by the team trainer and manager Joe Girardi.
Chapman, 29, has seven saves with a 3.55 ERA in 12 2/3 innings and 21 strikeouts in 14 appearances.
NY announced the move before Sunday's doubleheader against the Houston Astros and made it retroactive to Saturday.
But when it came time to find a long-term home in free agency, Chapman waltzed right back to the Bronx Bombers on a record-setting five-year deal worth $86 million. He gave up a run, then struck out Josh Rutledge with two on for the final out and briefly grabbed his left elbow while walking off the field with catcher Austine Romine.
Dellin Betances will step up as the closer in Chapman's absence. Regardless of your view of Chapman, he was a pivotal reason that the Cubs won their first World Series in over 108 years last season.