Commercial-type lawn mowers, whether they are walk-behind or riding mowers, normally include a mower deck having multiple rotary cutting blades positioned therein. The mower deck can be classified either as a mulching deck, a side discharge deck, a rear discharge deck or a bagging deck depending upon the manner in which the cut grass cuttings, clippings or discharge are handled or directed. When a mower is of the side discharge deck type, the grass clippings are discharged out one side of the deck and onto the ground.