Cook finished the year with 62 carries for 204 yards and no touchdowns while adding 12 catches for 52 yards on 17 targets, including the postseason.
The Ravens officially signed Cook to their 53-man roster Thursday.
The Ravens are in line to promote Cook from the practice squad Thursday, positioning him to suit up for Saturday's divisional playoff matchup against Houston, Adam Schefter of ESPN reports.
Cook -- who is currently on Baltimore's practice squad -- is likely to get an opportunity in the playoffs, as the Ravens are dissatisfied in the current state of their running back room, Jamison Hensley of ESPN.com reports.
Cook signed with Baltimore's practice squad Friday.
Cook's agency announced Thursday that the running back will sign with the Ravens ahead of the postseason, Tom Pelissero of NFL Network reports.
The Jets and Cook mutually agreed to part ways Tuesday, Tom Pelissero of NFL Network reports.
Cook didn't have a carry or target in Thursday's 37-20 loss to the Browns.
Cook didn't have a carry or target in Sunday's 30-28 win over the Commanders.
Cook rushed once for four yards and caught his lone target for six yards in Sunday's 30-0 loss to the Dolphins.