A representative for the reality star confirmed that she filed for divorce on Tuesday. Lozada also issued a statement saying Johnson "needs help."
This comes after Johnson was arrested for allegedly head-butting Lozada during an argument over the weekend. The fight reportedly occurred after Lozada questioned Johnson about a receipt for condoms that she found.
After Johnson was released from jail Sunday, he received word that the Miami Dolphins released him from the team.
The Associated Press contributed to this report.