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In Week 14 of the 2013 season, Detroit Lions defensive end Ziggy Ansah suffered a shoulder injury against the Philadelphia Eagles. After the game, Jim Schwartz indicated that the injury didn't appear to be a long-term thing, and Ansah played in the Lions' final three games.
It's unclear if this was to repair the original injury or if he recently re-aggravated it, but Ansah actually had surgery this offseason on his injured shoulder, according to Alex Marvez and Ross Jones.
.@DetroitLionsNFL DE Ziggy Ansah underwent shoulder surgery, source tells me & @FOXSports @RossJonesFOX. Ansah should b ready for '14 season
— Alex Marvez (@alexmarvez) February 20, 2014
After suffering the original shoulder injury, Ansah was questionable for the Lions' next game. He was not on the injury report for the final two weeks of the season, but again, it's not clear if this surgery was to fix the original injury or if he recently re-aggravated it.
In any case, with the surgery taking place this early in the offseason, I would hope that he will be ready for the 2014 season. Without knowing the details of what happened, it's tough to set a timetable for his recovery, but considering it's only February, it'd be disappointing if he's not good to go by the time training camp begins in late July.
(A few years ago, by the way, Ndamukong Suh had shoulder surgery following his rookie season.)