New York Yankees left-hander CC Sabathia was placed on the 15-day disabled list Sunday with fluid in his right knee.
An MRI revealed no structural damage but the knee was swollen enough and the pain uncomfortable enough to send Sabathia to the DL.
He will have the knee drained Monday in New York.
"The good thing is, as of right now, there's no meniscal tear," Yankees manager Joe Girardi said. "He's just some fluid and he needs a little time off."
The move came a day after another rocky start for Sabathia, who gave up four runs -- only one earned -- on eight hits, including three home runs in 5 1/3 innings of work.
In his last three starts, Sabathia is 0-2 and has a 6.42 ERA.
"A couple starts ago, I felt it tweaking every now and then, Sabathia said. "The last start, I felt it more in the second half and then pretty much all game yesterday. I just had to finally say something.
"I'm not going to make excuses or anything like that but it was something I really felt yesterday."
New York summoned right-hander Matt Daley from Triple-A Scranton/Wilkes-Barre and right-hander Alfredo Aceves is the likely candidate to start when Sabathia's turn in the rotation comes up next on Thursday against the Mets.