 An unrestricted free agent in the 2009 offseason, Butler agreed to terms on a four-year $14 million contract, which could be worth almost $17 million if all incentives are met, with the St. Louis Rams on March 9.Butler who was good all-around safety for the Giants was particularly noted for his run support, "Butler is far stronger against the run than the pass and will be used as an "in the box" safety" for the Rams.The move reunited him with former Giants defensive coordinator and now former head coach of the Rams, Steve Spagnuolo.