Hoping to rebound from their divisional home loss to the Seahawks, the Rams stayed at home for a Week 13 intraconference duel with the Atlanta Falcons.  With QB Marc Bulger out with a concussion, veteran back-up QB Gus Frerotte got the start. In the first quarter, St. Louis drew first blood as Frerotte completed a 1-yard TD pass to TE Randy McMichael and a 31-yard TD pass to WR Torry Holt.  In the second quarter, the Rams increased their lead with Frerotte completing an 8-yard TD pass to WR Isaac Bruce for the only score of the period. In the third quarter, the Falcons got on the board with kicker Morten Andersen nailing a 41-yard field goal for the only score of the period.  In the fourth quarter, Atlanta drew close with QB Chris Redman completing a 15-yard TD pass to WR Roddy White and a 5-yard TD to WR Michael Jenkins.  Afterwards, St. Louis pulled away with RB Steven Jackson getting a 50-yard TD run. For Isaac Bruce, he ended this game with 13,911 career receiving yards, surpassing Cris Carter for 5th All-Time.
Question: Who did Frerotte replace?
Answer: Bulger