ALLEN PARK -- The Detroit Lions were without three starters for OTAs on Wednesday, while a fourth attended the workout but did not participate.

Defensive tackle Nick Fairley and cornerback Chris Houston were absent once again as they deal with long-term injuries. Fairley underwent an undisclosed procedure sometime after last month's voluntary minicamp, while Houston continues to recover from toe surgery.

Veteran C.J. Mosley took Fairley's place on the defensive line, while Darius Slay and Rashean Mathis continue to rep as the first-team cornerbacks.

Receiver Kevin Ogletree also did not attend Wednesday's session with what offensive coordinator Joe Lombardi described as a dental issue.

Defensive end Ezekiel Ansah, tailback Joique Bell, cornerback Chris Greenwood and linebacker Brandon Hepburn attended the workout but did not participate, Ansah is believed to be recovering from shoulder and biceps injuries, while Bell is is rehabbing from a knee injury.

Rob Sims continues to practice but not rep during the 11-on-11 scrimmages. Rodney Austin again took his place at left guard during that portion of practice.

Detroit wraps up its second burst of OTAs on Thursday, then breaks until beginning its last batch of OTAs on Tuesday.