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The salary cap is directly linked to the league's revenue; as the NFL's income rises, so does the salary cap. This connection allows teams to offer higher pay to their players. However, the pandemic caused a notable dip in revenue, leading to a decrease in the cap by around $16 million for the 2021 season, bringing it down to $182.5 million.
Importantly, the salary cap solely applies to players' salaries and does not encompass coaches or training staff.