The Dolphins submitted a claim for Kerryon Johnson, according to Field Yates of ESPN.com (on Twitter). Unfortunately for them, the Eagles also submitted a claim for the former Lions running back, and they had the higher priority.
Miami has already invested a bit in the RB group this year, adding Malcolm Brown in free agency and drafting Gerrid Doaks in the seventh round. Meanwhile, they already have Myles Gaskin, Salvon Ahmed, Patrick Laird, and Jordan Scarlett on the roster. Their move for Johnson indicates that they could still explore backfield options between now and the fall.
Johnson, a 2018 second-round pick, was been slowed by injuries in his early seasons. However, he returned to play in 16 games last year. The Eagles hope that he can stay on the field and get back to his rookie form, when he averaged 5.4 yards per carry and scored four touchdowns, up until the first of two serious knee injuries.