Can't say I've seen this in a roster before...
Six TE/FB players made the initial roster. I have never seen much separation between FB and a move TE. Austin Hooper, Stephen Carlson, Harrison Bryant, David Njoku, Pharaoh Brown, and Andy Janovich on a team of 53 certainly shows how important the position has to be in this system.
But last year, Stefanski carried a combination of five. Considering Stanton is also waiting in the wings as a reserve/futures player, it's a position group that may not be finished changing by the end of the season.