The Opsera is a statistic I created in order to rank teams by how well they hit (OPS) and pitch (ERA). In order to determine a team's Opsera, I take their OPS, move the decimal point over one place to the right and then subtract the team's ERA from that number. * Previous week's ranking in parenthesis. 1. Los Angeles Dodgers: 4.22 (3) Since giving up nine earned runs in a 4.2 inning start in Colorado, Clayton Kershaw has allowed one earned run over his last 12 innings. 2. Toronto Blue Jays: 4.18 (2) Brett Cecil has given up one earned run in 14 innings, while Ricky Romero has allowed just four in 21 innings, giving Toronto a huge lift from their system. 3. Kansas City Royals: 4.13 (4) The Royals lead in ERA, complete games, shutouts and only trail Milwaukee in terms of quality starts. 4. New York Mets: 4.04 (11) John Maine has given the Mets three consecutive quality starts. 5. St. Louis Cardinals: 3.91 (1) Center field has been the only real position of weakness for St. Louis, with Rick Ankiel and Colby Rasmus combining to hit for an OPS of .626 while playing the position. 6. Milwaukee Brewers: 3.68 (8) Trevor Hoffman has given u three hits and no earned runs while striking out seven since coming off the DL. 7. Detroit Tigers: 3.59 (7) Magglio Ordonez has an OPS of .639, which is 230 points lower than his .869 in 2008 and 390 points lower than his near MVP season of 2007. 8. Atlanta Braves: 3.45 (9) The Braves missed Brian McCann's bat and since returning, he is 5-for-11 with a homer. 9. Boston Red Sox: 3.45 (6) The Boston starting rotation has been very iffy, with Tim Wakefield the only starter with an ERA under 6.00. Their starting rotation has combined for an ERA of 5.81, which is second worst in the MLB. 10. Texas Rangers: 3.33 (15) The Rangers have one homer for every 20.9 at bats. 11. Tampa Bay Rays: 3.30 (12) The Rays have a Pythagorean record of 18-15, which flips their actual record of 15-18. They are +15 in total runs scored versus allowed and have easily been the best defensive team in baseball. 12. Cincinnati Reds: 3.29 (14) The Reds are 10-5 at home, but just 7-9 outside the state of Ohio. 13. Colorado Rockies: 3.18 (18) Seth Smith has played well enough to warrant everyday consideration, hitting for an OPS of .994. 14. Houston Astros: 2.85 (16) The Astros have an OPS of .656 with two outs and runners in scoring position. 15. Chicago Cubs: 2.83 (17) Alfonso Soriano has hit a homer 21.7% of the time he has hit a flyball. 16. Los Angeles Angels: 2.83 (20) The Angels have arguably had the best starting pitching in baseball, with a 3.58 team ERA as starters. 17. Pittsburgh Pirates: 2.81 (5) The Pirates are 18-24 in their stolen base opportunities. 18. Arizona Diamondbacks: 2.77 (22) After a disappointing April, Justin Upton has an OPS of 1.262 during his first 37 May at bats. 19. Florida Marlins: 2.73 (25) The Marlins are 6-14 since they improved to 11-1 on April 19th. 20. San Francisco Giants: 2.73 (13) With only 109 runs scored, the Giants have almost 50% less than the top-ranked Jays who have 204. 21. Seattle Mariners: 2.68 (10) The Mariners have drawn a walk in just 6.9% of their at bats, which is last in the MLB, but at least they haven't struck out with great frequency. 22. Chicago White Sox: 2.64 (21) Matt Thornton is yielding a .478 BAbip, but has a 3.27 ERA largely thanks to striking out 19 batters in 11.0 innings. 23. Oakland Athletics: 2.62 (23) The A's are 1-3 in extra inning games and 2-7 in one-run games. 24. Washington Nationals: 2.60 (19) The Nationals have a .326 BAbip, which is second behind the Dodgers. 25. Philadelphia Phillies: 2.54 (26) The Phillies have undeniably been suffering from the World Series hangover, but Raul Ibanez has been shockingly excellent at the plate (1.041 OPS) and in the field (5.8 UZR). 26. New York Yankees: 2.42 (27) Mariano Rivera has given up 2.92 home runs per nine innings, almost six times higher than his career average of 0.50. 27. San Diego Padres: 2.39 (24) Scott Hairston has benefited from a BAbip of .379, well above his career mark of .294, which explains the .333 batting average and 1.004 OPS. 28. Baltimore Orioles: 2.28 (30) Adam Jones continues to be excellent at the plate, hitting .358/.418/.625 (1.043 OPS). 29. Minnesota Twins: 2.23 (29) Kevin Slowey has a K/BB rate of 12.50, but a WHIP of 1.51 due to a Bill Terry-esque .341 batting average against. 30. Cleveland Indians: 1.86 (28) Grady Sizemore's BAbip has dropped to .267, which lines up appropriately with his .227 batting average.