American League 2007 Hitting PER Analysis
9 Run Earned Total  
Batting Batting Contribution Base Earned Total
Rank PLAYER TEAM PER Average Ave (RCA) Ave (EBA) Bases Bases
1 Alex Rodriguez NYY 104.15 0.314 0.354 0.688 495 376
2 David Ortiz BOS 98.38 0.332 0.300 0.684 455 341
3 Magglio Ordonez DET 98.33 0.363 0.340 0.643 434 354
4 Carlos Pena TAM 97.63 0.282 0.291 0.686 411 307
5 Vladimir Guerrero LAA 87.85 0.324 0.288 0.591 387 314
6 Jim Thome CHW 87.31 0.275 0.264 0.635 338 243
7 Jorge Posada NYY 86.88 0.338 0.276 0.599 351 275
8 Curtis Granderson DET 85.75 0.302 0.259 0.599 416 338
9 Hideki Matsui NYY 83.93 0.285 0.288 0.551 344 267
10 Bobby Abreu NYY 82.66 0.283 0.302 0.524 378 269
11 Mike Lowell BOS 82.23 0.324 0.278 0.544 351 295
12 Carlos Guillen DET 82.08 0.296 0.271 0.550 351 283
13 B.J. Upton TAM 81.99 0.300 0.266 0.574 328 241
14 Victor Martinez CLE 81.69 0.301 0.266 0.551 346 284
15 Manny Ramirez BOS 81.39 0.296 0.273 0.556 309 238
16 Gary Sheffield DET 81.00 0.265 0.269 0.547 334 228
17 Jack Cust OAK 80.84 0.256 0.235 0.609 304 199
18 Torii Hunter MIN 80.79 0.287 0.269 0.539 361 303
19 Nick Markakis BAL 80.27 0.300 0.266 0.537 388 309
20 Alex Rios TOR 79.37 0.297 0.250 0.544 392 320

PER Analysis of the All-Time Greatest Hitters in MLB History

PER Analysis of the All-Time Greatest Pitchers in MLB History

PER Hitting Analysis of the 2008 AL Season

PER Pitching Analysis of the 2008 AL Season

 

Revolutionary Baseball Performance Efficiency Rating
The Baseball Performance Efficiency Rating (PER) system evaluates hitter's and pitcher's performance relative to plate appearances and innings pitched respectively.

For Hitters, the concept of a Batting PER develops and measures a player's Run Contribution Average and Earned Base Average. Accordingly, I've developed the following concepts of Run Contribution Average, Total Earned Bases, and Earned Base Average to complement the Batting Efficiency Rating.

Run Contribution Average (RCA ) comprises Total Runs Scored plus Runs Batted In, less total Home Runs. This is all divided by Total Plate Appearances. An RCA of 0.250 or higher indicates a good run producer, while an average of at least 0.300 indicates a hitter is an efficient run producer.

The Earned Bases Average (EBA) comprises Total Earned Bases (Total Bases plus total Bases on Balls, and total Stolen Bases produced by the Hitter) divided by total plate appearances and total steal attempts. This is the single most important statistic of a hitter since it measures all facets of his performance: hits (measured by total bases), walks drawn, and stolen bases, and compares it against every time he is at the plate or attempts a steal. His overall baseball skills is therefore assessed, and a true measure of his greatness is established. An EBA of greater than .600 indicates a great batsman and base runner, while a .700 or higher EBA indicates a premier batsman and all-time great Hitter.

The concepts of Run Contribution Average and Earned Bases Average are then combined in a very intuitive formula (and
adjusted for total plate appearances) to determine his Batting Efficiency Rating. As such, this is the single best measure of a baseball player's overall hitting performance since it measures his average, power, speed and run production, all combined in one statistic.

 Interpreting the PER Baseball Score
A score of 100 or greater is considered an extraordinary performance (in the top 1 % of the entire league)
  A score between 90 and 100 is considered a superior performance (top 5%)
 A score between 80 and 90 is considered above-average performance
  A score of about 70 is an average performance within the league
  A score below 70 is below-average performance
  A score below 60 is considered a significant under-performer

Read more of the PER Hitting Analysis...

Read more of the PER Pitching analysis...

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