Complex sentence: The acceptance of an offer will be based on factors such as the number of players in your squad in the same position, and the and if the clubs accept, the manager has the choice of which, if any, of the players to ultimately sign.
Split into simpler sentences: The acceptance of an offer will be based on factors such as the number of players in the squad in the same position. If the club accepts, the manager has the choice of which, if any, of the players to ultimately sign.