Willingham has told people close to him he plans to retire at the end of the season, the St. Paul Pioneer Press reports. Willingham is in the final season of a three-year, $21 contract and will be a free agent this winter. At age 36 next year and having missed close to 40 percent of his team's games the past two years due to injuries, Willingham apparently has decided to call it quits. However, his mind could change if he gets a large free agent offer or has a strong postseason.