Davis, who made a couple of big plays in his debut against the Pittsburgh Steelers, had become the Ravens' third cornerback. However, his season is now over and the Ravens are again getting thin at his position.
Tests revealed that Davis suffered a torn anterior cruciate ligament in his knee in the Ravens' 33-30 overtime loss to the Cleveland Browns. He'll become the ninth Raven to go on season-ending injured reserve.
"He’ll be out for the season, which is tough for him because he was playing at a really high level," coach John Harbaugh said.
Davis also tore his ACL last November, but impressed Dolphins officials with how quickly he recovered from the injury. Harbaugh said he was "99 percent" sure it wasn't the same knee, though.
With starting corner Lardarius Webb missing most of the Browns game with a thigh injury, the Ravens are left with just four healthy cornerbacks: Jimmy Smith, Kyle Arrington, Rashaan Melvin and rookie Tray Walker.
They do have cornerbacks Asa Jackson and Charles James on the practice squad, and the Ravens used second-year safety Terrence Brooks as the nickel back against Cleveland.
Harbaugh said finding Davis at that point in the season gives him faith that there are other options outside the building, but noted the presence of the practice squad players, too.
"It does give you confidence that you can find a guy," Harbaugh said. "We start getting past this time, past or close to the midway point, that’s where it kind of dries up on you. But there are some corners out there that we like and we’re looking at those guys. And we have a couple of corners on our practice squad, too."
Davis' injury was viewed as the most serious one in the game against the Browns. The Ravens also lost running back Justin Forsett (ankle), wide receiver Darren Waller (concussion) and rush linebacker Elvis Dumervil (groin).