AP

Brian Urlacher’s injured left knee may have been a bigger problem for him this offseason than previously believed.

The surgery Urlacher had on Tuesday was either the second or the third knee surgery of the year for Urlacher, according to John Mullin of CSNChicago.com.

Mullin cites two NFL sources as saying that Urlacher had surgery shortly after suffering a knee injury in the regular-season finale on January 1. It had previously been reported that Urlacher had opted for rest and rehabilitation instead of surgery.

And one source told Mullin that Urlacher actually had another procedure in the spring.

Urlacher has been sidelined since the beginning of this month with swelling and soreness in the knee, and he finally had surgery this week. He still says he thinks he can play Week One.