The Kings signed Sean May to a one-year, $884,881 deal last month, but a portion of a contract isn't guaranteed.
Sources told the Boston Globe that $100,000 of the deal, which is worth the veteran's minimum for a player with four years of NBA experience, is tied to May's weight.
The former Bobcat will receive the $100,000 if he reports to training camp or begins the season at or below 265 pounds.