Dolphins DE Phillip Merling has shown decreased explosiveness in training camp after missing much of last season with an Achilles' injury. Merling is running as the No. 5 end behind Randy Starks, Kendall Langford, Tony McDaniel, and Jared Odrick. The Miami Herald suggests Merling could be on the bubble, or perhaps traded if the right offer comes along. Defensive end is the Dolphins' deepest position. Merling has one tackle this preseason.