By Christopher Reina The Opsera is a statistic I created in order to objectively rank teams by how well they hit (OPS) and pitch (ERA). In order to determine a team's Opsera, I take their OPS, multiply that number by 10 to move the decimal point over one place to the right and then subtract the team's ERA from that number. With five weeks in the books, we finally have our first repeat leader in Opsera, with the Cardinals also leading after Week 4. The Phillies (Week 1), Yankees (Week 2) and Giants (Week 3) have been our other leaders. 1. St. Louis Cardinals 4.79 2. New York Yankees 4.76 3. Tampa Bay Rays 4.58 4. San Francisco Giants 4.55 5. Minnesota Twins 4.36 6. San Diego Padres 4.24 7. Philadelphia Phillies 4.20 8. Colorado Rockies 3.88 9. Toronto Blue Jays 3.54 10. Detroit Tigers 3.52 11. New York Mets 3.43 12. Chicago Cubs 3.37 13. Milwaukee Brewers 3.36 14. Texas Rangers 3.32 15. Oakland Athletics 3.09 16. Boston Red Sox 3.08 17. Washington Nationals 3.02 18. Florida Marlins 2.94 19. Los Angeles Dodgers 2.82 20. Seattle Mariners 2.76 21. Cleveland Indians 2.53 22. Atlanta Braves 2.53 23. Arizona Diamondbacks 2.51 24. Chicago White Sox 2.46 25. Kansas City Royals 2.30 26. Baltimore Orioles 2.27 27. Cincinnati Reds 2.01 28. Los Angeles Angels 1.97 29. Houston Astros 1.69 30. Pittsburgh Pirates 0.95 Chris Reina is the executive editor of RealGM. Follow him on Twitter at http://twitter.com/cr_reina.