The woman in question, whose name has not been released, is five weeks pregnant with Walton's child, a fact that she made him aware of days before the alleged assault took place, according to the outlet.
"During the course of the argument, Walton pushed (the woman) against a wall and punched her several times in the face and head". Walton was arrested and taken to Broward County Jail. "I observed (the woman) to have swelling on her left eye", the responding Davie officer wrote in his report.
Walton was booked for aggravated battery against a pregnant woman, which is a 2nd-degree felony with a maximum 15-year prison sentence. "We will have no further comment at this time", general manager Chris Grier said in a statement. The second-year player had served two games of a four-game suspension for violating National Football League conduct and substance abuse policies following three arrests last offseason in his hometown of Miami.
In a statement, the Dolphins said they waived Walton.
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Following his three arrests, Walton, who played for the Cincinnati Bengals at the time, was released from the team, but his probation has since been vacated, according to the outlet.
A message to Walton's agent for a response was not immediately returned.
The Dolphins are now likely in the market for a new lead running back starting in 2020. Off-field issues previous year led to his release from the Cincinnati Bengals.
Ex-Dolphins running back Mark Walton (22) warms up before an NFL football game against the Baltimore Ravens, in Miami Gardens, Fla. Walton agreed to a plea deal after the three criminal cases against him were combined, receiving probation.