Source: Phillip Merling has an Achilles' tendon injury

A bad offseason for Dolphins defensive end Phillip Merling has gotten a lot worse.

Per a league source, Merling has suffered an Achilles’ tendon injury. 

The extent of the injury, along with the timing and the cause, aren’t known.  The source said it’s possible that the injury happened not during offseason workouts, making it a non-football injury.

If — and we emphasize the if — it’s a non-football injury, the Dolphins can choose not to pay Merling’s salary of $600,000, in the event he’s unable to play in 2010.

Merling recently was charged with felony battery after allegedly beating up his pregnant girlfriend.