Miami Dolphins running back Mark Walton has been suspended four games for violating the league's NFL conduct and substance-abuse policy, per Joe Schad of the Palm Beach Post.
Head coach Brian Flores issued a statement on the suspension:
Miami DolphinsStatement from Head Coach Brian Flores on the suspension of Mark Walton. https://t.co/7LxKyimD4M
As Tom Pelissero of NFL Network noted, the punishment stems from before he joined the Dolphins this offseason. Walton spent his rookie season with the Cincinnati Bengals last year.