We have moved to our new permanent home at HighHeatStats.com!

All existing content will remain, but all new content is posted at our new location.

Extremes in 2011 BAbip vs. Established Norms

Posted by John Autin
I compared batters' 2011 BAbip (batting average on balls in play) to their established norms, which I defined as their combined BAbip for 2008-10. I set the minimums at 200 PAs for 2011 and 1,100 PAs* for 2008-10. There were 176 players in the study. I've included regular BA data as a frame of reference.

Make of it what you will! (And see Andy's related post.)



Biggest BAbip Increase -- 2011 vs. 2008-10:

Player
BAbip
% Change
BAbip 2011
BAbip 2008-10
BA 2011
BA
2008-10
BA
% Change
27.9%
0.335
0.262
0.306
0.254
20.5%
25.0%
0.380
0.304
0.338
0.285
18.6%
20.7%
0.309
0.256
0.302
0.247
22.3%
18.8%
0.361
0.304
0.314
0.278
12.9%
17.3%
0.332
0.283
0.305
0.260
17.3%
16.3%
0.292
0.251
0.272
0.242
12.4%
15.4%
0.344
0.298
0.320
0.258
24.0%
14.8%
0.318
0.277
0.230
0.241
-4.6%
14.2%
0.353
0.309
0.337
0.289
16.6%
14.2%
0.321
0.281
0.309
0.257
20.2%
13.8%
0.380
0.334
0.324
0.279
16.1%
13.7%
0.323
0.284
0.285
0.256
11.3%
13.0%
0.322
0.285
0.300
0.271
10.7%
12.2%
0.367
0.327
0.338
0.295
14.6%
12.0%
0.327
0.292
0.256
0.255
0.4%
11.7%
0.343
0.307
0.330
0.298
10.7%
11.5%
0.369
0.331
0.294
0.262
12.2%
11.2%
0.348
0.313
0.292
0.289
1.0%
10.8%
0.368
0.332
0.289
0.264
9.5%
10.3%
0.365
0.331
0.344
0.314
9.6%


Biggest BAbip Decrease -- 2011 vs. 2008-10:

Player
BAbip
% Change
BAbip 2011
BAbip 2008-10
BA 2011
BA
2008-10
BA
% Change
-35.8%
0.215
0.335
0.188
0.278
-32.4%
-25.9%
0.240
0.324
0.231
0.291
-20.6%
-25.5%
0.239
0.321
0.244
0.283
-13.8%
-25.2%
0.228
0.305
0.203
0.249
-18.5%
-23.6%
0.214
0.280
0.218
0.275
-20.7%
-22.7%
0.214
0.277
0.216
0.270
-20.0%
-22.0%
0.237
0.304
0.227
0.275
-17.5%
-21.3%
0.266
0.338
0.260
0.309
-15.9%
-21.1%
0.273
0.346
0.230
0.269
-14.5%
-21.1%
0.240
0.304
0.159
0.255
-37.6%
-20.5%
0.275
0.346
0.243
0.314
-22.6%
-19.3%
0.239
0.296
0.248
0.285
-13.0%
-17.9%
0.257
0.313
0.227
0.300
-24.3%
-17.9%
0.253
0.308
0.233
0.264
-11.7%
-17.3%
0.243
0.294
0.255
0.285
-10.5%
-17.2%
0.274
0.331
0.240
0.300
-20.0%
-17.2%
0.275
0.332
0.255
0.311
-18.0%
-17.1%
0.295
0.356
0.272
0.325
-16.3%
-16.1%
0.270
0.322
0.224
0.258
-13.2%
-15.4%
0.285
0.337
0.262
0.294
-10.9%


In case you're wondering why the negatives are larger than the positives, remember that overall BA in 2011 (.255) was about 2.3% lower than the composite 2008-10 BA (.261).
__________
* I used a 1,100 PA cutoff for the simple reason that I only wanted to deal with 1 screen's worth of results from the Play Index.

No comments:

Post a Comment