Buffalo Bills quarterback Josh Allen has cleared the NFL's concussion protocol and is expected to play in Week 5 against the Tennessee Titans, per Ian Rapoport of NFL Network.

Fullback Pat DiMarco and safety Dean Marlowe have also cleared the protocol and are expected to suit up on Sunday as well.

Allen suffered the concussion after a helmet-to-helmet hit from Patriots cornerback Jonathan Jones 16-10 loss to the New England last week.

Bills head coach Sean McDermott was not pleased by the hit, but Jones was not punished by the league. Jones did reach out to Allen after that rough hit.

Prior to leaving due to the concussion, Allen had had a rough game against the Patriots defense. He went just 13-of-28 for 153 yards with three interceptions. Although, he did have a rushing touchdown.

Matt Barkley came in for Allen and didn't do much better; he went 9-of-16 for 127 yards and a pick.

Allen is having a decent sophomore season for the Bills, who have started the season 3-1 under his leadership. He has completed 60 percent of his passes for 903 yards with three touchdowns and six interceptions.

But he has added a lot of value with his legs. He's rushed for 131 yards and already has three rushing touchdowns.

It remains to be seen how often Allen will continue to run this Sunday against the Titans after coming back from his concussion. Regardless, the Bills will need their quarterback to find a way to be effective if they are to grab a win on the road in Tennessee.