Chris Kluwe and Jared Allen now have a new rehab partner.

Reports surfaced on Wednesday that Vikings Pro Bowl center (yeah, I said it) John Sullivan had microfracture surgery on his knee and will be out for the next three to four months.  Of course, if one is going to miss four months as an NFL player, these upcoming four are the ones to miss.

That timeline puts Sullivan back into action by the time training camp rolls around, and all indications are that he should be fine by then.