The San Francisco 49ers had agreed upon a trade of NaVorro Bowman to the New Orleans Saints for a seventh round draft pick. But the 49ers backed out of the deal when they learned Bowman preferred to become a free agent and choose his next team.

"Lots of teams [are] trying to sign" Bowman now that he's a free agent, according to one source, and it will take "a few days" for him to make a decision.

The 49ers also spoke with the Ravens, Browns and Panthers. The Oakland Raiders are another possible destination as a contending team that wouldn't force Bowman to relocate. 

The Arizona Cardinals have acquired Adrian Peterson for an undisclosed 2018 draft pick.

Peterson signed with the New Orleans Saints in the offseason but their backfield was crowded while the Cardinals are without David Johnson.

The Cardinals released Chris Johnson to create a roster spot for Peterson.

"We are always on the lookout for opportunities to improve our team and we look at this as one of those opportunities," general manager Steve Keim said in a statement. "What Adrian has accomplished in this league is well-established. Our need for a spark in our running game right now is also obvious and we are excited to give him the chance to provide that."