Some people have said the move is proof that Sam is throwing in the towel on his football career and wants to focus on exploiting his off-the-field fame.
But moments ago, Sam fired back at the critics ... saying, "Football remains my unquestioned number 1 priority, however, while I continue to train and stay ready, I am ecstatic to participate in a fun, athletic competition like so many players before me have done."
"Filming this off-season is very flexible and allows me to be part of the veterans combine 3/22 if accepted or any other workouts."
"I’m looking forward to getting started with @PetaMurgatroyd and winning! Thanks for the support! #TeamSambatroyd."