Jared Allen underwent knee surgery
Sources: Vikings star end Jared Allen also underwent knee surgery | 1500 ESPN Twin Cities ? Minnesota Sports News & Opinion (Twins, Vikings, Wolves, Wild, Gophers) | Sportswire: Minnesota Vikings
Before having a torn labrum in his left shoulder repaired a couple months ago, Jared Allen said he hadn't had surgery since getting his tonsils out at age 5.
It turns out the shoulder wasn't all the Minnesota Vikings' star pass rusher had fixed this time.
Allen underwent knee surgery on Jan. 31, the same day he had the shoulder repaired, two NFL sources said.