Mets INF T.J. Rivera has been placed on the 10-day disabled list due to a partially torn UCL in his right elbow, the Mets announced Friday.
Rivera has received a platelet-rich plasma injection for the injury.
The Mets activated INF Neil Walker from the disabled list to replace Rivera on the roster.
Rivera, 28, is hitting .290 with a .330 OBP and .430 SLG with five HR and 27 RBI in 73 games this season.
A torn UCL can lead to Tommy John surgery, though recovery time for position players can be as little as six months. Recovery time for pitchers is 12-to-18 months.
Walker has been on the disabled list June 15 with a torn hamstring. He is expected to return to playing second base when he rejoins the Mets, despite starting the last few games at third base during his rehab with Triple-A Las Vegas.
"We just want to protect ourselves," manager Terry Collins said when asked about Walker working out at third base. "We want to make sure we cover all the bases. We talked to Neil about it and he was fine with it."
Walker has played just 15 games at third base during his nine-year career. His last appearance at third was in 2010 for the Pirates.
In 60 games this year, Walker is batting .270 with a .356 OBP, nine HR and 33 RBI.