Bob Rachitowski, Baseball Spotlight October 27, 2012
Traditionally in baseball, the lineup of batters has been adjusted, with batters hitting from different sides of the plate, depending on the hand (left or right) with which the pitcher throws. Platooning involves batting one batter against right-handed pitchers and a different batter at the same position against left-handed pitchers. This article is an attempt at summarizing how platooning might have been used in the LRS.
The scope of the report covers players on major league rosters as of October 22, 2012. Batters on major league rosters who have not had a plate appearance have been excluded. Batters with plate appearances against pitchers of only one hand have also been excluded. These include Hiroshi Ueno (who had only one plate appearance against a left-handed pitcher and none against right-handed pitchers), Munoto Sugimoto and Ichizo Ageda (who had only five and four plate appearances, respectively, against right-handed pitchers and none versus left-handed pitchers).
The batters covered had a total of 61,915 PA, with 45,031 against right-handers and 16,884 against left-handers. This amounts to 2.667 PA against right-handers for every one against a left hander, or 72.73% of the total plate appearances against right-handed pitchers. Right-handed batters had 28,667 PA versus right-handed pitchers and 11,601 PA versus left-handed pitchers, or 71.19% of their PA against righties. Left-handed batters had 12,759 PA versus right-handed pitchers and 4,269 PA versus left-handed pitchers, or 74.93% of their PA against right-handed pitchers. Switch hitters had 3,605 PA against right-handed pitchers and 1,014 PA against left-handed pitchers, or 78.05% of their PA against right-handed pitchers. Surprisingly, this means left-handed batters saw more right-handed pitchers percentage-wise than right-handed hitters.
Collectively, left-handed hitters accumulated a .286 AVG, .367 OBP, .454 SLG and .821 OPS against right-handed pitchers. Left-handed batters hit for a .274 AVG, .327 OBP, .416 SLG and .744 OPS against left-handed pitchers. Measured by OPS, this indicates a 1.35% increase against right-handers.
Right-handed batters hit for a .261 AVG, .322 OBP, .397 SLG, and .719 OPS versus right-handed pitchers. Right-handed batters marked up a .265 AVG, .341 OBP, .409 SLG, and .750 OPS versus left-handed pitchers. This indicates a 4.31% increase versus left-handers measured by OPS.
Switch hitters hit for a .252 AVG, .312 OBP, .361 SLG, and .673 OPS versus right-handed pitchers. Switch hitters hit for a .236 AVG, .295 OBP, .345 SLG, and .640 OPS against left-handed pitchers. This indicates a 5.15% increase versus right-handers measured by OPS.
Are certain hitters better suited as platoon hitters – in other words, more effective if utilized primarily on one side of the plate rather than the other? Let’s use some graphs to get a general idea of how league hitters perform versus pitching hand.

|