Marshall was among more than a dozen Dolphins at headquarters after a federal judge declared the NFL lockout illegal and the league lifted restrictions on team contact with players.
Marshall was briefly hospitalized after being stabbed in the abdomen April 23 and is expected to fully recover. He spoke by phone with general manager Jeff Ireland on Thursday.
Marshall's wife, Michi Nogami-Marshall, was charged with aggravated battery with a deadly weapon last week. She told officers she was defending herself, according to an arrest report.
Quarterback Chad Henne also arrived at headquarters -- in his convertible, with the top down. Others dropping by included tight end Anthony Fasano, fullback Lousaka Polite, linebacker Channing Crowder and nose tackle Paul Soliai.
The only one stopping to talk with reporters was Fasano.
"I got a flight to catch," he said as he departed. "I'll be at work on Monday."