This could be the most important week of the baseball season with the non-waiver trade deadline coming up next Monday.

So this week’s power rankings will revolve around the week when general managers make their money. The Yankees and Mets are two of the most prominent teams, with the Yankees searching for starting pitching and the Mets trying to get the best package for Carlos Beltran.

1. Phillies (64-36) (Previous ranking: 1) — Roy Halladay’s eight solid innings Saturday end concerns after leaving Monday’s start early because of heat. Reportedly in talks with Rays for B.J. Upton.

2. Red Sox (62-37) (2) — Jon Lester makes return from DL on Monday night, but Boston needs help in outfield.

3. Giants (59-43) (5) — Seem to be leaders in Beltran derby.

4. Rangers (58-44) (4) — Heath Bell has been prominently mentioned as possibility for Texas.

5. Yankees (59-40) (6) — Phil Hughes getting roughed up by A’s is biggest indicator they need to add to rotation.

6. Braves (59-43) (3) — Derek Lowe was the Game 1 starter for Atlanta in last year’s NLDS vs. San Francisco. This year he may not make roster if team returns to playoffs, but biggest need remains hitting thanks to Dan Uggla’s ugly 2011.

7. Brewers (54-49) (7) — Seem to want to make another move, but traded most of top prospects in offseason to get Zack Greinke and Shaun Marcum in rotation.

8. Angels (55-47) (9) — Season may have turned with rally from 8-3 deficit against Rangers on Wednesday. Still 3 games back, but could become buyers to add to inconsistent lineup.

9. Tigers (54-47) (11) — If playoffs started today, Detroit would have to choose between Max Scherzer, Brad Penny and Rick Porcello to start Game 2 behind Justin Verlander.

10. Cardinals (53-48) (10) — Desperately need No. 3 starter behind Chris Carpenter and Jamie Garcia. Bolstering bullpen also a priority.

11. Pirates (52-47) (8) — No one should know better than Pittsburgh that pennant races don’t come too often for small-market teams; hopefully that will propel the Pirates to make a move.

12. Diamondbacks (55-47) (12) — Perhaps they are getting nostalgic for Mark Reynolds, rumors that they are interested in Carlos Pena (another big strikeout, big home run guy) are floating.

13. Rays (53-47) (13) — Sound like sellers at the moment with Upton backup plan for teams going after Beltran.

14. Indians (51-48) (14) — Hiroki Kuroda possibility for Cleveland, trying to keep pace with Detroit.

15. Blue Jays (51-51) (17) — May be one of quietest teams at deadline.

16. Reds (50-51) (15) — Biggest pickup may end up being Dontrelle Willis, who has had three solid starts.

17. White Sox (49-51) (18) — GM Kenny Williams is among most aggressive in baseball and AL Central is up for grabs.

18. Mets (50-51) (16) — Ideal situation for GM Sandy Alderson with Beltran turning into top trade target.

19. Marlins (49-53) (19) — Interesting that special assistant to president, Jeff Conine, recently said if he had his way they would trade Hanley Ramirez.

20. Twins (47-54) (20) — Past week going 3-5 against division leading Indians and Tigers at home could make them sellers with Matt Capps a popular name.

21. Nationals (49-52) (21) — Chien-Ming Wang’s return could have them trading away Livan Hernandez or Jason Marquis, according to reports.

22. Rockies (48-54) (22) — Ubaldo Jimenez is best pitcher available, you know, if he is available.

23. Dodgers (45-56) (23) — Selling players first, team next?

24. Orioles (40-58) (25) — A lot of teams could use Jeremy Guthrie.

25. Padres (44-58) (26) — ESPN reported Bell has a bag packed for his wife to send to him when he gets traded.

26. Athletics (44-57) (27) — Could Hideki Matsui get some interest after impressive weekend against Yankees?

27. Royals (42-59) (28) — Teams looking for bullpen help could pursue Joakim Soria.

28. Cubs (42-60) (29) — Finally won three in a row for first time all season.

29. Mariners (43-58) (24) — Current 15-game losing streak may make them more likely to deal.

30. Astros (33-68) (30) — Guess who the Cubs beat in all three of those games?