MMAMania.com has the story:
The third time will hopefully be the charm for Jon Fitch (19-3) now that up-and-coming welterweight Mike Pierce (10-1) has agreed to step up and face him at UFC 107 from the FedEx Forum in Memphis, Tenn., on Dec. 12.
Pierce was originally slated to meet Josh Koscheck at UFC Fight Night 20 until “Kos” was promoted to the UFC 106 co-main event opposite Anthony “Rumble” Johnson.
Like Pierce, Fitch was left without an opponent when Ricardo Almeida injured his knee and withdrew from their UFC 106 bout on Nov. 21. Zuffa worked a little magic and booked him in a rematch of former number one welterweight contenders opposite Thiago Alves on Dec. 12; however, “Pitbull” also went down with a knee injury and was forced to bow out.