Buffalo Bills rookie quarterback Josh Allen will miss Monday's game against the New England Patriots, coach Sean McDermott said.
Derek Anderson, who started Sunday in a 37-5 loss to the Indianapolis Colts, will start.
Anderson, making his first start since December 2016, was 20 of 31 with 175 yards, three interceptions and lost a fumble.
Allen was injured in the third quarter of the Bills' loss to the Houston Texans. McDermott said Allen remains week to week.
In other injury news:
LeSean McCoy, who suffered a concussion on the Bills' second play from scrimmage, flew back with the team. McDermott said it was too early to have any prognosis.
"He's in the protocol and that's all I can say right now," McDermott said.
Defensive lineman Trent Murphy is considered week to week with an ankle injury.
This story will be updated.