The New York Mets put first baseman Lucas Duda on the disabled list Saturday for what they hope will be only a 15-day stay to relieve recurring back stiffness.
Duda sat out six games this month because of the condition, then played three games and had to leave Friday's game against the Colorado Rockies because of discomfort.
"The only way to solve these things is to rest him," Manager Terry Collins said.
Duda did not have an MRI exam when the back stiffness first appeared, but the Mets were encouraged that his condition improved with medication and sitting for a few days.
Yankees retire Jorge Posada's No. 20 jersey
Catcher Jorge Posada had his No. 20 jersey retired by the New York Yankees before a game against the Cleveland Indians.
The team also unveiled a plaque in Yankee Stadium's Monument Park honoring Posada's 17-year career, all with the club, in which he was a key part of four World Series championships.
"Ever since I could remember, all I wanted to do was play baseball. Ever since growing up in beautiful Puerto Rico, everything I did was work toward my goal. I don't think I had a Plan B," Posada said. "Baseball was my passion and luckily I had the privilege and honor to play for the greatest franchise in all of sports."
Fans chanted the familiar "Hip, hip, Jorge!" several times during a ceremony, that included a nearly eight-minute speech by Posada made in front of family and many of his former teammates.
Posada holds the record for most postseason games as a catcher (119) and won five silver slugger awards as the best hitter at that position.