T-Rich all smiles: The Browns have a list of players who should benefit from the new offense being installed by Rob Chudzinski and Norv Turner. At the top might be running back Trent Richardson.

Richardson is wearing a constant smile at Browns’ minicamp. It’s almost as if he can’t contain a good secret. As if he knows what’s in store.

“I can’t wait till this year,” Richardson said after his first practice under new coach Rob Chudzinski and coordinator Norv Turner. “I think there’ll be big smiles on everybody’s faces after the games this year … not too many sad faces.”

The famed power running game featured by Turner, which has produced three NFL rushing champions, has Richardson pumped. But there’s more.

His two broken ribs finally have healed and his knee cartilage problem, which cost him all the preseason games of his first camp, is a distant memory.

“I feel great … 100 percent,” Richardson said. “I wish you can all be out there to watch the whole practice. I’m out there flying around. I finally feel skinny. I don’t have that big (protective) pad on me.

“It’s way easier to breathe. I can sleep at night. I feel better than ever.”

A roller coaster ride: Richardson’s rookie season was a series of ups and downs. His preseason was washed out by a surprise trip to Dr. James Andrews in Pensacola, FL, to have a cartilage chip removed in a knee.

He made it back in time for the season opener. That’s when he made the head-on helmet hit of Eagles safety Kurt Coleman that rocked Cleveland Browns Stadium and reverberated through the offseason.