The St. Louis Rams' rookie quarterback received that amount in guaranteed money -- the most in NFL history -- after he signed a six-year, $78 million contract that has a maximum value of $86 million Saturday.
The Rams and the former University of Oklahoma quarterback concluded negotiations in time for the team's first full-squad workout, which was scheduled for Saturday.
Spagnuolo reiterated earlier this week that veteran backup A.J. Feeley is the Rams' starting quarterback entering training camp. But Bradford, the 2008 Heisman Trophy winner, shouldn't be on the bench for long.
Bradford led the nation with 48 touchdown passes for Oklahoma in 2008. He played in just three games in 2009 before undergoing season-ending shoulder surgery.
Bradford attended the Rams' mandatory minicamp last month as well as a rookie minicamp after the draft. He missed three practices for rookies, quarterbacks and veterans coming off injuries, two of them Thursday.
The Associated Press contributed to this report.