According to Ian Rapoport of NFL Network, the contract is a three-year deal worth $21 million, including $11 million guaranteed.
Crabtree, 30, signed a three-year deal, and he becomes the top receiver for a team going through an overhaul at the position this offseason. In 2016 he posted 89 receptions for 1,003 yards and eight touchdowns.
Crabtree, while three years Grant's senior, has been far more productive throughout his career.
The Ravens have seen plenty of Crabtree.
"Michael has played very well against the Ravens, so we know firsthand the attributes he brings to the game", Newsome stated. He comes to Baltimore five years after his controversial finish in Super Bowl XLVII, where, as a member of the San Francisco 49ers, he didn't get a chance to make a catch on a fourth-and-goal pass in the end zone.
The wide receiver played for the 49ers from 2009-14.
Despite Crabtree's steady production, the Raiders cut him Thursday and cleared his $7.7 million cap hit off the books in order to sign Jordy Nelson.
Crabtree is taking over the possession receiver role that Baltimore had once envisioned for Ryan Grant.
The Ravens chose to part ways with wide receiver Jeremy Maclin a few days ago and don't seem intent on re-signing veteran free agent wide receiver Mike Wallace, either. His 25 touchdown grabs in three seasons with the Raiders ranked fifth in the National Football League over that span. Ozzie Newsome said he had "no control" over the failed physical.