Cornerback Williams picked off Doug Johnson in the end zone in the first quarter to keep the game scoreless. With St. Louis leading, 3-0, in the second, he popped a ball loose from tight end Alge Crumpler and recovered it.
After the interception, the Rams drove from their own 1 to the Falcons' 10-yard line before Jeff Wilkins kicked a field goal. Following the fumble, Bulger capped a 58-yard drive with a three-yard sneak up the middle, making it 10-0.
Bulger completed 23-of-34 passes. He threw a 21-yard TD strike to Torry Holt in the third quarter and found Holt from 14 yards in the fourth. Holt had 11 catches for 161 yards.
St. Louis is 3-2, Atlanta 1-5.