Jeff Roberson, File, Associated Press
FILE - In this Aug. 20, 2011 file photo, Tennessee Titans cornerback Cortland Finnegan, right, reaches for a tipped pass intended for St. Louis Rams wide receiver Mike Sims-Walker during the first quarter of an NFL football game, in St. Louis. The Rams and free agent cornerback Finnegan have agreed to terms on a contract. Finnegan was undergoing a physical and Jeff Fisher, the Rams' new coach, planned for a news conference Thursday, March 15, 2012, to introduce the player.

ST. LOUIS — Cortland Finnegan comes by his feisty disposition naturally. The St. Louis Rams' new shutdown cornerback joked that the single mother who raised him, Linda Finnegan, is a wild woman with about 400 tattoos.

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Jeff Fisher has always appreciated the edge Finnegan brings to the game, making one of his favorite Titans players the first piece of a franchise he's rebuilding from the ground up.

The 28-year-old Finnegan stuck with his comfort zone when he signed a five-year, $50 million deal with $27 million guaranteed and $33 million in the first three seasons. Though he was one of the top defensive players in free agency, Finnegan wasted no time opting for the familiarity of Fisher, who in 2006 invested a seventh-round draft pick on the small player from tiny Samford.