Here is a look at Corsi Ratings (based on average 60 minutes of even strength ice time) for the Boston Bruins through 58 games played:
The Good
Vladimir Sobotka +7.6
Michael Ryder +7.3
Blake Wheeler +7.2
The Bad
Chuck Kobasew -10
Stephane Yelle -8.5
P.J. Axelsson -6.9
Note: Johnny Boychuk (1 GP, -13.4) and Martins Karsums (5 GP, -9.8) would have fell in the bottom 3, but I didn't think that 1 game or 5 games was a big enough sample size to slap a "Bad" tag on them.
The Mediocre
Matt Lashoff +0.3
Marco Sturm EVEN
Aaron Ward -0.6