He was about 6'5, 204 pounds when he entered the OU program last January, but since then he has bulked up to 218-222 pound range and it is starting to look like his frame is now ready for the college game.
"He is starting to look like our quarterbacks typically look," Heupel assessed. "That's just a young kid getting in to a college football program and treating his body the right way and training the right way."
It's not always easy to add the weight, but Heupel says Allen is very conscience about his training regimen.
"He has done a good job and he pays real close attention to what he is doing and he has a plan for getting himself ready to play at a high level."
It is goof to hear that Allen has taken the right steps in the weight room, because he could possibly be a missed block away from getting some live action.
In a perfect world he does not have to burn his red-shirt, but sometimes things do not always work out perfectly.
Still Heupel is pleased with his progression so far.
"He has done some good things," Heupel informed. "Obviously, he has gotten some good reps here with the injury to Sam and that type of thing than maybe we would have expected. But he is gaining a better understanding of what we are doing offensively and he is getting himself in to a position, if needed, he can play at a high level.
"He has the ability to do some QB run game with or he can certainly tuck it if things aren't there down the field he can do some things with his feet."