Twenty percent of his salary for next season will become guaranteed if he passes all six of his weigh-in checkpoints this season (his body fat percentage must be less than 295), another 40 percent if he plays in at least 41 games and an additional 20 percent if he plays in at least 51. The final 20 percent gets guaranteed again if Williamson plays in at least 61 games, but he is already in jeopardy of missing that mark. Williamson has missed 11 of a possible 17 games so far.