The Chicago Bulls have exercised their fourth-year option on forward Taj Gibson for the 2012-13 season.

Taken with the 26th pick in the 2009 draft, Gibson has made 89 starts in his career and is averaging 8.0 points and 6.6 rebounds. Mainly a reserve last season, he was a key contributor on a team that won a league-leading 62 games and advanced to the Eastern Conference finals, averaging 7.1 points and 5.7 rebounds.

The Bulls announced the move on Wednesday.