A lawn mower includes a discharge baffle assembly coupled to a cutting deck pan adjacent an opening. The discharge baffle assembly includes a discharge chute extending outwardly from the cutting deck pan. The discharge baffle assembly also includes a baffle plate movable within a gap between the discharge chute and the cutting deck pan. The baffle plate is movable between a first position, in which the baffle plate substantially covers the opening of the cutting deck pan, and a second position, in which the baffle plate is spaced apart from the opening of the cutting deck pan. The discharge baffle assembly further includes an actuator coupled to the baffle plate. The actuator is operable to move the baffle plate relative to the opening of the cutting deck pan.