New York Mets right-hander Daisuke Matsuzaka was placed on the 15-day disabled list with inflammation in his right elbow on Saturday.
According to Mets manager Terry Collins, Matsuzaka, who underwent Tommy John surgery on the same elbow back in June 2011, will need about one week to 10 days before he can start throwing.
"He's not going to be back in 15 days," Collins said. "He needs to rest the elbow. The inflammation really needs to subside to get a better idea of what's going on. It'll be at least seven to 10 days without throwing and then we'll have more to say after that."
Matsuzaka pitched two innings in relief in which he surrendered a pair of home runs in Thursday's opener against the Brewers before complaining of discomfort in the elbow. The 33-year-old underwent an MRI in New York on Friday and was given the diagnosis by the team's doctor the following day.
Collins said there has been no discussion yet about surgery.
This season, Matsuzaka appeared to have made a resurgence after his ligament-reconstructive surgery. The former Boston Red Sox, who has a 3-3 record with one save and a 3.87 ERA, has made 28 appearances, including nine starts in 2014.