Monday, June 22, 2015

Quality of Competition

The Pirates were swept over the weekend by the Nationals. Going into the series, Pittsburgh was on an eight-game winning streak. The reversal of form isn't a complete surprise, though, given that the winning streak was against three of the worst teams in baseball (Brewers, Phillies, White Sox), while Washington leads the National League East (after sweeping the Bucs).

This raises a concern: Are the Pirates a team that beats up on weak teams, but can't compete with good ones? Studies have shown that a poor record against teams with winning records portends problems in postseason play.

So far, the Pirates are, indeed, doing well against poor competition. Here's the record of National League teams against clubs playing below .500:

 Cardinals    22- 9 .710  Braves       21-16 .568  Rockies      17-18 .486
 Dodgers      31-13 .705  Padres       14-12 .538  Nationals    16-17 .485 
 Pirates      24-12 .667  Cubs         17-16 .515  Giants       21-23 .477
 Mets         19-10 .655  Reds         14-14 .500  Phillies     10-15 .400
 Diamondbacks 15-10 .600  Marlins      10-10 .500  Brewers       5-14 .263

Uh-oh. The Pirates have the third best record in the league against teams below .500. So they've been vulnerable to better clubs, right? Here are the NL teams against opponents playing .500 or better:

 Giants       17-10 .630  Reds         18-22 .450  Marlins       20-31 .392
 Cardinals    23-15 .605  Padres       20-26 .435  Brewers       20-32 .385
 Cubs         20-14 .588  Diamondbacks 19-25 .432  Rockies       13-21 .382
 Nationals    21-16 .568  Braves       14-19 .424  Dodgers        8-18 .308
 Pirates      15-18 .455  Mets         17-25 .405  Phillies      14-32 .304

So, yeah, the Pirates have a losing record against teams that are playing .500 or better. But so do most teams. And, in fact, they're fifth best in the National League against teams with winning records. So there's really nothing to worry about, so far, which is more than can be said for the playoff contenders in New York and Los Angeles.
  

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