Saturday, April 13, 2013

Willie Mays and Hank Aaron: what if they had switch hit?

Willie Mays and Hank Aaron were the two greatest right handed hitters in the 1950s and 1960s.  Below is a rough estimate of how they might have done had they switch hit.  As mentioned in previous posts leading up to this percentage differences during those seasons are using this as the base:
vs RHP as RHB (Versus Right Handed Pitcher as Right Handed Batter).

The basic reasoning is that any batter can learn to switch hit and that these two great hitters would get at least the advantage against righty pitchers as all lefty MLB batters averaged during those seasons.

Their new career averages are weighted by the percentage of plate appearances (PA) or at bats (AB) as appropriate against righty and lefty pitchers.

Click this link to view detailed data.

                   BA OBP  SLG  OPS
Aaron career 0.305 0.374 0.555 0.928
Mays career 0.302 0.384 0.557 0.941

Mays Split                    BA  OBP   SLG  OPS    PA% AB%
Mays vs RHP as RHB 0.300 0.373 0.541 0.915 71.19% 72.32%
Mays vs LHP as RHB 0.305 0.410 0.593 1.003 28.81% 27.68%

Mays                      BA OBP    SLG  OPS
Mays RHP - LHP -0.005 -0.037 -0.052 -0.088
Mays Pct Dif        -1.67% -9.92% -9.61% -9.62%

Aaron Split                      BA  OBP   SLG  OPS    PA% AB%
Aaron vs RHP as RHB 0.299 0.362 0.537 0.898 73.77% 74.60%
Aaron vs LHP as RHB 0.318 0.405 0.603 1.007 26.23% 25.40%

Aaron                       BA OBP   SLG    OPS
Aaron RHP - LHP -0.019 -0.043 -0.066 -0.109
Aaron Pct Dif        -6.35% -11.88% -12.29% -12.14%

MLB Pct Dif 8.19% 10.51% 9.72% 10.01%

Mays                                        BA OBP  SLG  OPS
Mays vs RHP + MLB Pct Dif 0.325 0.412 0.594 1.007
Mays new career                0.319 0.412 0.593 1.005

Aaron                                       BA OBP  SLG   OPS
Aaron vs RHP + MLB Pct Dif 0.323 0.493 0.589 0.988
Aaron new career               0.322 0.470 0.593 1.063

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