Frerotte was notified of the team's intentions Wednesday by Rams coach Scott Linehan, who said the organization had elected not to pay the quarterback a $500,000 roster bonus.
"I'm a little surprised, but that's the way it goes in this business," Frerotte said. "I've played 14 years, and that's a long time. I'm looking forward to spending time with my family."
The 36-year-old Frerotte filled in for the injured Marc Bulger on a frequent basis in 2007, making three starts and appearing in eight games. He completed 94 of 167 passes for 1,014 yards, with seven touchdowns and 12 interceptions. His last stint as a regular starter came for the Miami Dolphins in 2005, as Frerotte threw for 2,996 yards and rallied the Dolphins to six consecutive victories at the end of the season. But the Dolphins released him after signing Daunte Culpepper, and he signed with the Rams to play for Linehan, who had been his offensive coordinator in Miami and a prior stint with the Minnesota Vikings.
Selected in the seventh round of the 1994 draft by the Washington Redskins, Frerotte ultimately beat out No. 3 overall pick Heath Shuler, and he was selected to the Pro Bowl after the '96 season. He lost his starting job to Trent Green two seasons later and went on to play for six other teams, starting playoff games for the Detroit Lions in the 1999 season and the Denver Broncos the next year.
Brock Berlin, who started one game for the Rams as a first-year player last season, could be in line to become Bulger's backup, depending on who else the team acquires in the draft or via free agency or trade.