Technically, the offseason workout program and practices are voluntary to Kansas City Chiefs players. According to the bargaining agreement between the NFL and NFLPA, the only offseason event players are required to attend and participate in is the three-day minicamp the Chiefs will hold in June.
Most if not all players will attend when the program begins Monday and attendance will be something close to perfect throughout. The Chiefs, like the other 31 teams, prefer players to be working out under their guidance and frown upon those who don't attend and participate.
Many players also have financial incentives to work out with their teammates in Kansas City. Thirty-three players will receive a bonus if they complete a certain percentage of the workouts. These bonuses range from significant ($300,000 to safety Eric Berry) to "pocket change" ($8,000 for linebacker Nico Johnson and defensive back Sanders Commings).