What is the proper call if a player is fouled from behind while pursuing the ball?

When a player is fouled from behind while pursuing the ball, the appropriate call is a personal foul. This situation typically arises when a defensive player makes illegal contact with an offensive player who is attempting to gain possession of the ball. A personal foul is assessed for physical contact that disrupts the play and affects the ability of the player to continue pursuing the ball.

Technical fouls are issued for unsportsmanlike conduct or violations of game administration, not for physical contact in regular play. Flagrant fouls are called for excessive or violent contact that is deemed to be unnecessary and can put a player at risk of injury; however, a simple foul from behind while pursuing the ball doesn't meet this criterion. Offensive fouls usually occur when an attacking player makes illegal contact with a defender or violates rules during their movement, which is not the case in this scenario.

Thus, the correct action in this situation is to call a personal foul for the illegal contact made while the player was pursuing the ball.