The Hall of Fame quarterback subsequently contacted the Miami Dolphins -- his former team -- and denied the report.
"Chipping and putting with [celebrities], maybe, but not dancing with them," Dolphins public relations president joked Harvey Greene to the Sun-Sentinel.
Marino retired prior to the 2000 NFL season, partly because of his hindered mobility after a ruptured Achilles' and several surgeries on his knees. He currently works as a studio analyst for CBS' NFL coverage.
ABC will formally reveal the show's seventh-season cast during Good Morning America's August 25 broadcast.