It's all a crap shoot: here's an article from the Boston Globe:
Link
LINEBACKER
The Patriots have 17 linebackers on their roster. The important spot is obviously the inside linebacker position of Tedy Bruschi. While a decision on Bruschi's future is expected in the next 30 days, the Patriots have tried to compensate for his potential loss by adding former Chief Monty Beisel and former Steeler and Seahawk Brown, to go along with Ted Johnson.
Dan Klecko, who had been converted to inside linebacker before his season-ending injury last year, should be in the mix, and young Eric Alexander, a protege of the departed Roman Phifer, could emerge.
The Patriots have a full complement of outside 'backers, led by Willie McGinest, Mike Vrabel, and Rosevelt Colvin. Could be the year for Tully Banta-Cain to earn some playing time in the rotation.
There was also an article in yesterday's paper which spoke more of Brown being a pass rush specialist vs. a tackle type of guy. It looks like the Pats are going to be heavily into the "situational" substitution world when it comes to their linebackers. With Teddy out, I foresee most of these guys with lines of 4-0-0.5, or 3-3-0, etc... Not many fantasy points for ONE guy.