=4-31 The number of victories (W), earned run average

(ERA), runs scored (R), batting average (AVG), and on-base percentage (OBP) for each team in the American League in the 2012 season are provided in the following table. The ERA is one measure of the effectiveness of the pitching staff, and a lower number is better. The other statistics are measures of effectiveness of the hitters, and higher numbers are better for each of these.

Team W ERA R AVG OBP Baltimore Orioles 93 3.90 712 0.247 0.311 Boston Red Sox 69 4.70 734 0.260 0.315 Chicago White Sox 85 4.02 748 0.255 0.318 Cleveland Indians 68 4.78 667 0.251 0.324 Detroit Tigers 88 3.75 726 0.268 0.335 Kansas City Royals 72 4.30 676 0.265 0.317 Los Angeles Angels 89 4.02 767 0.274 0.332 Minnesota Twins 66 4.77 701 0.260 0.325 New York Yankees 95 3.85 804 0.265 0.337 Oakland Athletics 94 3.48 713 0.238 0.310 Seattle Mariners 75 3.76 619 0.234 0.296 Tampa Bay Rays 90 3.19 697 0.240 0.317 Texas Rangers 93 3.99 808 0.273 0.334 Toronto Blue Jays 73 4.64 716 0.245 0.309