Selectively usable roller striper for lawn mower

A rotary cutting deck has a roller striper along a rear side thereof. The roller striper comprises a pivotal frame that rotatably journals a roller made from a plastic roller body. Torsion springs surround the pivots for the frame. The springs put enough downforce on the plastic roller body to lay the cut grass over in a rearward direction as the cutting deck moves forwardly over the ground. The roller striper can be selectively moved into and out of engagement with the ground by a pivotal handle that can be manipulated by an operator from a seat of the lawn mower on which the cutting deck is installed.