Darrell Arthur underwent a magnetic resonance imaging (MRI), which revealed a torn right Achilles tendon, the team announced today.

Arthur (6-9, 235), who suffered the injury on Dec. 18, is scheduled to have surgery to repair the injury within one week and expected to be ready for the start of the 2012-13 season.

The 23-year-old averaged career highs in points (9.1), field goal percentage (.497), blocks (0.79) and minutes (20.1) in 80 games last season in his third NBA campaign. He posted 7.1 points and 2.2 rebounds in 15.5 minutes during Memphis’ 13-game run in the 2011 Playoffs.