Miami Dolphins star defensive back Xavien Howard was arrested just hours after his team beat the New England Patriots on Sunday ... cops say he roughed up his fiancee in an argument over a purse.
According to police documents obtained by TMZ Sports, Howard -- who missed the Fins' win over the Pats because of recent knee surgery -- got into an altercation with his baby mama at their Davie, Florida home late Sunday night.
In the docs, the woman claims Howard began arguing with her because he was pissed off over a recent purchase of a purse.