ADDS ROOKIE TO SPECIFY TRAINING CAMP- Washington Redskins quarterback Robert Griffin III throws during the first day of the team's rookie NFL football training camp at Redskins Park in Ashburn, Va., Sunday, May 6, 2012. (AP Photo/Manuel Balce Ceneta)

ORCHARD PARK, N.Y. (AP) -- Washington Redskins rookie quarterback Robert Griffin III capped his much-anticipated NFL preseason debut with a touchdown in a 7-6 win over the Buffalo Bills on Thursday night.

Overcoming a muffed handoff, RG3 capped his third and final series of the game by completing three passes for 58 yards, including a 20-yard TD to Pierre Garcon. He finished 4 of 6 for 70 yards in showing flashes of the potential the Redskins saw in drafting the Baylor product with the No. 2 pick.

The Bills came out sloppy, particularly on offense. Buffalo had two drives stall inside the Redskins 20 in the first half. Rian Lindell hit field goals from 43 and 45 yards, and pushed one wide left from 22 yards.