Board recorded seven tackles (five solo) during Sunday's 24-19 loss versus the Eagles.
Board agreed to a contract with the Ravens on Tuesday, Ryan Mink of the team's official site reports.
Board was released by the Patriots on Thursday.
Board signed a a two-year deal with the Patriots on Friday, Tom Pelissero of NFL Network reports.
Board (knee) will play Sunday against the Patriots.
Board (knee) is questionable for Sunday's matchup against the Jets.
Board and Alex Anzalone took the majority of first-team reps at linebacker this spring, Dave Birkett of the Detroit Free Press reports.
The Lions signed Board to a one-year contract Monday, Mike Garafolo of NFL Network reports.
Board was activated off the reserve/COVID-19 list Wednesday, Clifton Brown of the Ravens' official site reports.
The Ravens placed Board on their reserve/COVID-19 list Wednesday.