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After helping the team win the 2014 title, he signed a four-year, $28-million contract with the Spurs this summer.
While Diaw has been great for the last two seasons, he does have a history of inconsistency. His final year in Charlotte was a disaster. He put on a noticeable amount of weight, shot a dismal 41%, and was waived.
As an incentive for Diaw to stay in shape, the Spurs have put an unusual "weight clause" in his contract.
According to ESPN's Amin Elhassan, Diaw gets $150,000 if weighs 254 pounds or less on October 25th, $150,000 if he's 254 pounds or less on the day after the All-Star break, and $200,000 if he's 254 pounds or less on April 1st.
The Spurs official website currently lists Diaw at 250 pounds. As long as he doesn't gain five pounds, he gets $500,000.
Diaw's weight was be the subject of a good-natured back and forth between him and coach Gregg Popovich in September.
Popovich said the Spurs had a betting pool for what Diaw would weigh at the beginning of training camp.