Did you know that the number two career leader for plate appearances does not appear on this single season leaders for plate appearances chart? Neither does the number three through number nine players to be specific!
The American League single season record for plate appearances made was set in 2004 by Ichiro Suzuki of the Seattle Mariners. The National League single season record for plate appearances was set in 2007 by Jimmy Rollins of the Philadelphia Phillies.
A plate appearance during the season by definition counts every trip to home plate by the batter including hits, walks, outs and reaching base by error. The only thing that does not count as a plate appearance for the batter is when the time at bat is interrupted by an inning ending caught stealing or other event that prevents the completion of the plate appearance.