All drafted rookies must fit under the rookie salary cap, which is a smaller figure under the overall cap. What determines a player’s cap number? The signing bonus is spread out, or amortized, over the number of contracted years. Drafted rookies sign four-year contracts. With first-round rookies, teams have the right to extend a player for a fifth year. If the signing bonus is $10 million, that means that $2.5 million is counted against the cap for each of the four years. The minimum rookie salary for the 2020 season is $610,000. All of the salary in a cap year is counted against the cap.