At RealGM, we use the Field Impact Counter (FIC) to objectively measure how effectively teams are performing. We combine the position players and pitchers' FIC scores to measure which teams have played the best so far in 2008. Click here for more information about the Field Impact Counter and the Reina Value. *Through Tuesday's games Team: FIC Per Game Total (FIC Position Players/FIC Pitchers) 1. Chicago Cubs: 20.8 (10.2, 10.6) Kerry Wood has a 3.07 ERA and eight saves during the month of May. 2. Philadelphia Phillies: 19.0 (9.5, 9.5) Opposing batters are hitting for an OPS of 1.034 during Brett Myers' five May starts. 3. Boston Red Sox: 18.8 (8.8, 9.9) Boston has been downright dominant at Fenway with a 21-5 record, but Tito's club is just 11-18 on the road despite the very strong Red Sox nation traveling contingent. 4. Atlanta Braves: 17.9 (8.1, 9.8) Brian McCann is having a superb season behind the plate, hitting .328/.391/.593 with nine homers. 5. Arizona Diamondbacks: 17.8 (7.4, 10.4) Undoubtedly the D-Backs are for real, but they are 8-1 against the Rockies and 22-21 against the remainder of their opponents including an combined 0-6 versus the Cubs and Marlins. 6. Houston Astros: 17.7 (8.2, 9.5) With the way Houston is scoring, if they were getting even just decent pitching (Roy Oswalt: 5.61 ERA), they would be flip flopped with the Cubs for first in the NL Central. 7. St. Louis Cardinals: 17.5 (7.7, 9.7) Dave Duncan has another very good pitching staff on his hands, with his starters posting a 3.93 ERA, and Chris Carpenter still not having thrown an inning. 8. Tampa Bay Rays: 17.2 (6.6, 10.6) Since starting the season 3-5, the Rays are 28-16. Dioner Navarro currently has an OPS of .885, well above his career mark of .701. 9. Texas Rangers: 16.9 (8.7, 8.2) The Rangers' production at first base (.210/.303/.355) looks a lot like what we once saw from the Braves during the pre-Mark Teixeira days of Julio Franco, but Josh Hamilton and Milton Bradley are making up much of the difference. 10. Chicago White Sox: 16.6 (6.5 10.2) The right side of the White Sox infield is combining to hit .206. 11. Cincinnati Reds: 16.2 (7.0, 9.3) Corey Patterson's .200/.240/.352 in 145 at bats was a total waste of time, and Jay Bruce's 3-for-3 debut came a month and a half too late. 12. New York Yankees: 16.0 (6.9, 9.1) A-Rod has finally learned to love Yankee Stadium; he is batting .333/.400/.667 at home and just .246/.375/.424 on the road. 13. New York Mets: 15.9 (6.8, 9.1) Billy Wagner keeps on annoyingly talking, but he does have a 0.43 ERA and 23 K's in 21 innings. 14. Toronto Blue Jays: 15.9 (5.0, 10.9) The Jays are second in the AL in ERA with a mark of 3.43 (3.65 for starters, 2.90 for relievers). 15. Los Angeles Dodgers: 15.9 (6.7, 9.2) Somehow the Dodgers are 21-15 when Andruw Jones starts compared to 20-20 for Matt Kemp and 19-23 for Andre Ethier. 16. Oakland Athletics: 15.7 (5.3, 10.4) A's starters have a 3.28 ERA with three pitchers under 3.00 and expected ace Joe Blanton having the worst ERA with 3.92. 17. Los Angeles Angels: 15.6 (5.4, 10.2) John Lackey has returned from his injury to throw a 2.05 ERA in his three starts. 18. Florida Marlins: 15.3 (5.9, 9.4) Hanley Ramirez is batting just .205/.300/.273 over his past 50 plate appearances. 19. Detroit Tigers: 14.9 (7.4, 7.5) Magically/mysteriously/bafflingly, the Tigers have been shutout eight separate times this season or once in every 6.5 games. 20. Milwaukee Brewers: 14.9 (5.6, 9.3) The Brewers are 10-6 in one-run games but 15-21 in the remainder. 21. Baltimore Orioles: 14.7 (5.3, 9.4) The Orioles have had a very solid bullpen, giving up just 62 runs in 161.2 innings while striking out 119. Closer George Sherrill has a 3.57 ERA with 17 saves and a +1,176% Reina Value as the 48th most productive player (3rd best closer) according to our FIC. 22. Pittsburgh Pirates: 14.5 (6.3, 8.2) The Pirates currently have the best outfield in baseball with Nate McLouth, Jason Bay, and Xavier Nady combining for 32 homers. Pirates' infielders have combined to hit .243/.299/.358 compared to .303/.393/.536 for their outfielders. 23. Minnesota Twins: 14.4 (5.3, 9.1) Nick Blackburn is another young pitcher who has blossomed with the Twins, posting a 3.39 ERA, which is down from his 7.71 ERA during six relief appearances last season. 24. Cleveland Indians: 13.7 (4.4, 9.2) Lost in the Cliff Lee bonanza is how dominant fellow southpaw Aaron Laffey has been in May; he now has a 1.59 ERA and 0.983 WHIP, brilliantly pitching to contact. 25. Colorado Rockies: 13.7 (5.6, 8.0) Rockies' second basemen and shortstops have combined to hit .233 (98-421). 26. San Francisco Giants: 13.1 (4.1 9.0) Tim Lincecum has won 33.3% of the Giants' 21 victories. 27. Seattle Mariners: 12.9 (5.3, 7.6) Ichiro Suzuki is batting just .295 for the season (career average is .332) but is hitting .347 over his past 105 at bats. 28. Washington Nationals: 11.5 (3.2, 8.3) The Washington outfield is hitting .207/.292/.294 with just eight home runs. 29. Kansas City Royals: 11.4 (2.8, 8.7) Brian Bannister has an 8.44 ERA on the road and 6.03 during the month of May after his promising start to the season. 30. San Diego Padres: 10.4 (1.8, 8.6) The Padres have a 5.42 ERA on the road and just 3.31 at Petco Park. - Christopher Reina is the executive editor of RealGM and the creator of the Reina Value.