Patriots running back Fred Taylor underwent surgery today to repair severe ligament damage in his right ankle and could miss the rest of the season, according to a league source. The 33-year-old Taylor, who is the team's leading rusher this season through four games with 201 yards on 45 carries and two touchdowns, is facing the likelihood of being done for the year, according to the source. But there is a small chance that Taylor could return during the final month of the regular season depending on how his recovery progresses. Source: The Boston Globe