The 6-foot-10 right-hander is not scheduled to throw another bullpen session until Tuesday, and he'll be unavailable for the club's first few Grapefruit League exhibitions.
"We're just going to sit him out three days and see where he's at," Yankees manager Joe Girardi said. "He doesn't necessarily feel it when he's doing his exercises or when he's throwing -- his strength is great.
"But he complained after he shut it down, so we thought the right thing to do was to shut him down for three days, get some treatment, and see where he's at."
2010 Spring Training - null
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Spring Training Info
Brackman, 25, had impressed team officials by showcasing cleaner mechanics and better command of his pitches during early bullpen and live batting-practice sessions.
"This seems to be very, very minor," Yankees pitching coach Larry Rothschild said. "It's really more precautionary more than anything else. I'm keeping an eye on that. I'm well aware. I want to keep the momentum going with him, because they've done a nice job getting him to this point and we just really want to keep it going."
A first-round selection of the Yankees in 2007, Brackman is a long-shot contender for a spot at the unsecured back end of the Yankees' rotation. He made it as far as Double-A Trenton last year, where he was 5-7 with a 3.01 ERA in 15 games (14 starts).
Brackman began last season at Class A Tampa, where he was 5-4 with a 5.10 ERA in 12 starts.
"It's not going to hurt me," Brackman told the Newark (N.J.) Star-Ledger. "But it couldn't be a worse time."