The plan to keep rookie quarterback Josh Allen on the bench lasted just one week.

The Buffalo Bills will start the No. 7 overall pick in the draft Sunday against the Los Angeles Chargers, the team announced Wednesday.

That means Nathan Peterman, a second-year pro who has struggled significantly in his three career starts, will once again be relegated to the bench. Peterman won the after a three-way quarterback competition in training camp that also involved former Bill AJ McCarron, whom the team traded to the Raiders on Sept. 1.

Peterman completed five for 18 passes for 24 yards and two interceptions, posting a 0.0 QB rating in a 47-3 season-opening loss Sunday against the Baltimore Ravens. Coach Sean McDermott benched Peterson in the third quarter in favor of Allen, marking the second time out of his three career starts that he had been benched. In the other, a Week 14 game against the Indianapolis Colts, he suffered a concussion, though he never reclaimed the starting job after he cleared concussion protocol.

More:NFL QB Hot Sheet: Patrick Mahomes could be on verge of something big with Chiefs

"I don't feel a need, honestly, to elaborate (on the decision)," McDermott said in a news conference. "We talk a lot in-house about decisions and the right move. ... This is the right move for us."

When Allen entered the game against the Ravens, he did slightly better, completing six of 15 passes for 74 yards. Buffalo moved the ball better than when Peterman was in the game, though most of Allen’s snaps came against Baltimore’s backups.

Allen, who is 6-foot-5 and 237 pounds, has impressive arm strength and athleticism, but may need more seasoning and experience before he can become a consistent quarterback in the league.

Follow Lorenzo Reyes on Twitter @LorenzoGReyes.