ORCHARD PARK, N.Y. — The Bills finally built a lead they couldn’t squander,and upstaged Willis McGahee in his first game back to Buffalo.

Making good on an opportunity to secure the starting job, rookie quarterbackTrent Edwards went 11-of-21 for 153 yards and engineered five scoring drives inhelping Buffalo to a 19-14 win over the Baltimore Ravens on Sunday.

The Bills’ defense did its part, limiting the Ravens to two scores despitesix drives into Buffalo territory. That included Baltimore’s final drive whenKyle Boller couldn’t convert a fourth-and-1 from the Buffalo 49, his passfalling just out of the reach of Musa Smith with 1:49 remaining.

The Bills improved to 2-4 and eased memories of their last outing, a 25-24loss to Dallas in which Buffalo squandered an eight-point lead in the final 20seconds. It was the second game Buffalo lost in the final seconds after a 15-14loss to Denver in the season opener.

Rian Lindell hit four field goals, including a 41-yarder, and Marshawn Lynchscored on a 1-yard plunge, giving the Bills a 19-7 lead late in the thirdquarter.

McGahee made his mark, overcoming a slow start and a booing crowd, byscoring on a 46-yard run in his first game back since the Bills traded him toBaltimore in March. But it wasn’t enough for a popgun Ravens attack thatfeatured three rookie offensive linemen and was minus starting QB Steve McNairand tight end Todd Heap.

Boller went 21-of-36 for 191 yards in making his second straight start inplace of McNair, who’s nursing a sore back and groin injury.

The banged-up Ravens (4-3) enter their bye with an opportunity to gethealthy.

The Ravens’ offense sputtered in the first half, managing one first down and29 yards on its first three possessions. Baltimore lacked discipline, penalized11 times for 91 yards.

Edwards played an efficient game, his outing nearly ruined when he made abad pass intended for Lee Evans that was intercepted by Samari Rolle at theBills 14 midway through the fourth quarter. The turnover set up Derrick Mason’s15-yard scoring catch on fourth-and-11.

Edwards, a rookie third-round draft pick, was making his third straightstart in place of J.P. Losman — and first since Losman recovered from a sprainedleft knee. Edwards has now produced both Bills victories, showing signs hedeserves to remain the starter.

The one knock against Edwards is he and the offense lack finishing power.

The Bills led 9-0 at the half, settling for three field goals despite threedrives inside the Ravens 20. That included Buffalo managing minus-1 yard after apass interference penalty on Rolle gave the Bills a first-and-goal from the 7.

Edwards did hit Evans for a 54-yard gain in engineering a five-play, 71-yarddrive capped by Lynch’s score late in the third quarter.

Lynch has now accounted for four of five touchdowns scored by the Bills’offense, and he finished with 84 yards rushing.

McGahee finally found his stride with a gutty run up the middle to score onthe Ravens’ opening drive of the second half. McGahee sidestepped safety DonteWhitner in the hole, shoved aside defender George Wilson at the 25, and hadenough forward momentum to stumble and then dive into the end zone.

The score was McGahee’s second touchdown rushing of the season and hefinished with a season-best 114 yards rushing.