Dolphins DE Phillip Merling was arrested Wednesday night after a domestic dispute with his pregnant girlfriend.
The third-year player is due in magistrate court Thursday after being charged with aggravated battery against a victim he should have known was pregnant, according to reports.
Merling is expected to compete for a starting job in training camp, although he could be facing a suspension for violating the league's personal-conduct policy.
Four Dolphins players have been arrested since early February.
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