The term FLEX stands for flexibility. Users have the ability to select any player from any position to be a FLEX player. This means if you want to play defensively, you may add more defensive players as your FLEX players.
➤For Soccer the user can choose 2 extra players with the positions A (Attacker), Midfielder) and D (Defender).
➤For NFL the user can choose 1 extra player with the position RB, WR and TE.