NBA

Report: Tim Duncan exercises option, still mulling future

Apr 28, 2015; Los Angeles, CA, USA; San Antonio Spurs forward Tim Duncan (21) reacts in the final seconds against the Los Angeles Clippers in game five of the first round of the NBA Playoffs at Staples Center. The Spurs defeated the Clippers 111-107 to take a 3-2 lead. Mandatory Credit: Kirby Lee-USA TODAY Sports

Apr 28, 2015; Los Angeles, CA, USA; San Antonio Spurs forward Tim Duncan (21) reacts in the final seconds against the Los Angeles Clippers in game five of the first round of the NBA Playoffs at Staples Center. The Spurs defeated the Clippers 111-107 to take a 3-2 lead. Mandatory Credit: Kirby Lee-USA TODAY Sports

A person with knowledge of the situation tells The Associated Press that San Antonio Spurs star Tim Duncan has exercised his contract option for next season but is still mulling his playing future.

Yahoo Sports first reported Duncan's decision on Tuesday. The person spoke to the AP on condition of anonymity because the Spurs have not publicly disclosed Duncan's decision.

Duncan exercised the option for $5.6 million. But the move doesn't necessarily mean the 40-year-old franchise mainstay will return for another season.

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Duncan averaged 8.6 points and 7.3 rebounds last season, far below his career averages. But he remains revered and valued by the organization for his leadership and defensive ability, and the Spurs would love to have him back.