Dodgers LHP Clayton Kershaw felt a recurrence of soreness in his back after throwing a four-inning simulated game Saturday at Dodger Stadium and will be shut down until the pain goes away.
The outing was intended to be Kershaw's last tuneup before he rejoined the big-league roster. The three-time Cy Young Award winner has not pitched since June 26 due to a herniated disc.
Manager Dave Roberts told the Los Angeles Times that a date for Kershaw's return is "uncertain."
"I don't know if it's a step back," Roberts said Tuesday. "But we're going to let the back pain subside and see where we go."
The Dodgers had initially hoped Kershaw could pitch either Thursday in Washington or Friday in St. Louis.
"Clayton is going to do everything he can to get back," Roberts said. "But, yeah, we're better when he's active, obviously."
Kershaw leads the majors with a 1.68 ERA in 16 starts this season. He has 145 strikeouts and only nine walks in 121 innings.
Also, the Dodgers put LHP Hyun-Jin Ryu and RH reliever Casey Fien on the 15-day disabled list because of elbow tendinitis. OF Joc Pederson, who missed 15 games because of a sprained right shoulder, was activated from the 15-day DL, and LHP Luis Avilan was recalled from Triple-A Oklahoma City.
ANGELS: RHP Nick Tropeano has a UCL tear in his pitching elbow and will likely need season-ending Tommy John surgery.
CARDINALS: INF Jhonny Peralta went on the 15-day disabled list with a ligament strain in his left thumb.
RED SOX: RH reliever Junichi Tazawa, on the disabled list since July 4 because of a shoulder impingement, made it through a simulated game without issue and hopes to be activated Friday.
ROYALS: Minor-league RHP Kyle Zimmer, one of the team's top prospects, is scheduled to have season-ending surgery to address thoracic outlet syndrome, a neurogenic issue that is caused by the compression of nerves near the neck and shoulder.
YANKEES: 1B Mark Teixeira was out of the starting lineup for the third straight game because of a sore left foot. Teixeira fouled a ball off his foot Saturday. … CF Jacoby Ellsbury reached base on catcher's interference for the ninth time this season, the most in more than two decades.