Brown was a prized 2009 free agent acquisition signing a five year, $37.5 million dollar deal that included $20 million in guaranteed money, according to this article from ESPN.
The release of Brown frees up $2.8 million in added cap room for 2012. The Rams are likely to make more roster moves to clear additional space, however.
The most likely remaining cut, in my mind, is defensive tackle Fred Robbins. A cut of the soon-to-be 35 year old Robbins would save the Rams approximately $4 million for the coming season.
Other possible cuts could also include Ron Bartell (a $6.2 million savings) and Brandon Gibson (a $1 million savings).
Some other alternatives to create more room regarding the 2012 cap would include restructuring the deal of Jason Smith (who may be cut if he doesn't agree to a pay cut) and inking Chris Long to a new deal.
Long is due over $18 million this year. A new contract for Long could save big bucks for 2012 and the upcoming Free Agency period.