Explained: NFL tells Brandon Aiyuk he owes the 49ers about $13M, AP source says

The NFL told Brandon Aiyuk he needs to repay the San Francisco 49ers about $13 million in previously received bonuses

reserve/left squad list

An NFL roster designation for a player who has left the team without permission, removing them from the active roster

NFLPA

National Football League Players Association, the labor union representing NFL players

contract hold-in

A player attending team activities but withholding full participation (e.g., practice) to pressure for a new contract, as opposed to a holdout

guaranteed money

Portion of a contract promised to a player regardless of performance or roster status, unless voided under specific conditions

management council

The NFL's labor relations arm that negotiates and enforces league rules with teams and the players' union