What players had the biggest differences between their home and away walk rates?

I looked into this because I saw that Mel Ott walked 955 times in home games but only 765 in away games (and he had more PAs in away games). He hit 323 HRs in home games and 188 away. So maybe opponents wanted to be careful with him at the Polo Grounds where it was only 257 feet down the RF line (Ott batted left-handed).

I had Stathead call up all the players with 2,500+ PAs in both home and away games. Then I only looked at guys that were on both lists (924). Then I calculated walk% as walks/PAs

Here are the top 33 in Home walk%/Away walk%. I went down to 33 because Ott was 33rd. Tillie Walker and Rondell White are outliers. Walker hit 79 of his 118 HRs at home. White hit 124 of his 198 HRs in away games. So maybe there is no pattern.

Player	Home BB%	Away BB%	H/R ratio
Tillie Walker	0.089	0.054	1.659
Rondell White	0.077	0.047	1.638
Cy Seymour	0.073	0.052	1.398
Chick Hafey	0.085	0.061	1.389
Mike Lowell	0.098	0.071	1.386
Barry Larkin	0.120	0.087	1.376
Elston Howard	0.075	0.054	1.373
Alexei Ramírez	0.055	0.040	1.369
Hal Chase	0.039	0.029	1.364
Tito Fuentes	0.057	0.042	1.355
Juan Samuel	0.076	0.056	1.345
Andre Dawson	0.063	0.047	1.341
Al Simmons	0.074	0.056	1.336
Tony Armas	0.054	0.040	1.336
Cy Williams	0.102	0.077	1.333
Bill Virdon	0.077	0.058	1.327
Marlon Byrd	0.071	0.054	1.317
Les Mann	0.071	0.054	1.309
Mark Kotsay	0.089	0.068	1.308
Bobby Doerr	0.114	0.087	1.308
Luis Aparicio	0.074	0.057	1.301
Jimmie Wilson	0.078	0.060	1.298
Bob Boone	0.092	0.071	1.298
Granny Hamner	0.063	0.049	1.287
Darryl Hamilton	0.107	0.083	1.287
Jim Gilliam	0.141	0.109	1.287
Mark Loretta	0.096	0.074	1.286
Gary Carter	0.106	0.082	1.285
Jerry Lumpe	0.088	0.068	1.284
Roy Hartzell	0.098	0.077	1.283
Francisco Lindor	0.097	0.075	1.282
Jeff Heath	0.119	0.093	1.282
Mel Ott	0.171	0.133	1.281

Now the bottom 33

Player	Home BB%	Away BB%	H/R ratio
Neifi Perez	0.038	0.046	0.810
Nick Markakis	0.087	0.104	0.842
Jim Northrup	0.079	0.093	0.850
Torii Hunter	0.063	0.073	0.867
George McBride	0.062	0.071	0.869
Bill Bradley	0.041	0.047	0.876
Lonny Frey	0.110	0.124	0.885
Ted Simmons	0.083	0.093	0.887
Chris Young	0.092	0.104	0.889
Buck Herzog	0.068	0.076	0.891
Jack Fournier	0.091	0.102	0.892
Howie Kendrick	0.051	0.057	0.893
Gil McDougald	0.098	0.110	0.894
Justin Turner	0.084	0.094	0.894
Mickey Rivers	0.041	0.046	0.896
David Bell	0.075	0.084	0.898
Jim Spencer	0.071	0.079	0.898
Hughie Critz	0.042	0.047	0.901
Bobby Byrne	0.080	0.089	0.902
Johnny Evers	0.103	0.115	0.903
Miguel Tejada	0.057	0.063	0.906
Bobby Thomson	0.077	0.085	0.907
Jerry Priddy	0.109	0.120	0.908
Martín Prado	0.062	0.069	0.908
Ben Chapman	0.106	0.116	0.908
Aurelio Rodriguez	0.044	0.048	0.910
Heinie Zimmerman	0.040	0.044	0.911
Daniel Murphy	0.060	0.066	0.913
Travis Jackson	0.059	0.064	0.913
Ray Boone	0.110	0.120	0.919
Bucky Harris	0.082	0.089	0.919
Stuffy McInnis	0.042	0.045	0.922
Tony Taylor	0.069	0.075	0.923