What is commonly referred to as a "roster bonus" in NFL contracts?

A "roster bonus" in NFL contracts specifically refers to a payment that a player receives for being on the team's active roster by a certain date. This type of bonus serves as an incentive for players to remain with the team and can be structured to ensure a player is committed to the team as the season begins. Roster bonuses are typically due on specific dates, such as at the start of the league year or during training camp.

The other options describe various forms of bonuses or compensations that may exist in NFL contracts but do not accurately represent what a roster bonus entails. Monetary rewards for achieving team milestones and performance stats may relate to performance bonuses, while off-season training participation typically involves other forms of compensation that are not directly tied to roster status. Roster bonuses are distinct in that they are contingent solely on the player's placement on the roster.