St. Louis Cardinals (27-27) 
The good times: 20-11 with a 3.5-game lead in the National League Central on May 9.  
The bad times: 7-16 run since then. Everything simply cooled off. The offense has been stymied of late (1 run last three games) and Lohse, Westbrook and Lynn finally came back down to earth.  
Notes: The Cardinals have the worst "luck" in the National League at -5 games. Their Pythagorean W-L record is 32-22 which is tops in the NL.

Atlanta Braves (29-25) 
The good times: 25-15 with a 1.5-game lead in the National League East on May 19. 
The bad times: Lost eight in a row but have bounced back some by winning three of last four. With the exception of Brandon Beachy, Atlanta's starting pitching has been a big disappointment, ranking 15th of 16 NL teams in ERA. 
Notes: After a three-game series at Miami, the Braves play 15 straight games against the American League East.

Los Angeles Dodgers (33-21) 
The good times: 33-15 with an amazing 7-game lead in the National League West.  
The bad times: Matt Kemp back on the DL and the team has lost six of their last seven and see their lead dwindle to just three games. 
Notes: The Dodgers have played by far the fewest above .500 teams in the NL at 15. They are 12-3 in those games.

Baltimore Orioles (30-24) 
The good times: 27-14 with a two-game in the American League East. 
The bad times: Nine of their last 12 games were against the AL East and they managed to record just two wins of the lot. The pitching staff was overachieving to the point where over a month into the season, the team’s ERA was 2.76. That obviously wasn't going to last and it sits nearly a run higher a month later. The concern is will it get worse when some of their fringe arms start to wear down and face their division rivals for a third and fourth time?  
Notes: Baltimore has scored and allowed the same amount of runs this season yet they are currently six games over .500.