Peters is entering his fourth year in the league, made the Pro Bowl twice and was named All Pro once.
Trades can not become official until new league year beings on March 14.
The report from Ian Rapoport of NFL Network says that Kansas City got multiple picks back from the Rams, although it's uncertain what he got back. The ball-hawking cover man compiled 19 interceptions in just three seasons. Peters is truly a once-in-a-generation player. As Mike Florio of Pro Football Talk wrote: "The Chiefs became sufficiently exasperated with Peters past year to suspend him for one game". Browns General Manager John Dorsey was the G.M.in Kansas City when Peters was drafted in the first round of the 2015 draft.
But, as with the Alex Smith trade, there are also some good reasons for the Chiefs to get rid of Peters. Peters reacted to a penalty in the Chiefs' secondary by picking up the flag, throwing it into the stands, leaving the field because he thought he had been ejected and then eventually returning to the game.
The trade continues an offseason revamping of the Chiefs roster.
Peters play-making ability is game-changing, one the Rams hope will move them to a second straight division title.
The 49ers, after making National Football League history with Garoppolo's deal this month, definitely are in the market for a cornerback to join their starting lineup alongside 2017 rookie Ahkello Witherspoon and nickel back K'Waun Williams.
Peters is still playing on his rookie contract and, because he was a first round pick, the Rams will have a fifth-year option they will most certainly use.