Lance Kendricks and Danny Amendola scored on catches of 23 and 8 yards, and Steven Jackson ran for 49 yards on seven carries in a 151-yard first quarter that handed the backups a two-touchdown cushion. The Rams (1-1) totaled 215 yards in a 38-3 loss last week at Indianapolis.
Bradford was 6 for 9 for 102 yards for St. Louis (No. 28 AP Pro32). Matt Cassel played the first half for Kansas City (1-1) and was 13 for 18 for 142 yards.