He's enjoyed watching Manziel develop this season, and saw some flashes of what he could be when the pair worked this summer.
"He's got this great sense of awareness and vision. He's so creative," said Whitfield, who then offered a James Bond analogy. "There's always some kind of 007 escape route in mind. If Cam is Superman, I would say that Johnny is like 007."
Growing up in Kerrville, Texas, Manziel didn't dream of football stardom. He always pictured his path leading to a baseball diamond.
"I always thought since I was a little kid that I would play pro baseball," said Manziel, who also starred on his high school baseball team. "My biggest dream was that I wanted to play in the MLB. I wanted to play for the Rangers and wanted to play shortstop."
But fate stepped in and altered his dream.
"Then football came along and took center stage," he said.
Manziel's success on the field seems almost too good to be true. And when he rescued a kitten from the middle of a busy, four-lane road near Kyle Field earlier this season, it only added to the mystique of Johnny Football. (The semi-daring rescue is referenced on his Heisman page.)
"Just rescued a kitten from the middle of Wellborn Rd," Manziel tweeted in September when he wasn't allowed to talk to the media because of coach Kevin Sumlin's ban on freshmen interviews. He added a picture of a scared-looking black cat to prove his story.
Things haven't always been rosy for Manziel. In June, he was arrested in town after police said he was involved in a fight and produced a fake ID. He was charged with disorderly conduct and two other misdemeanors.
"It was a critical mistake in my life," Manziel said. "It was something that I learned a lot from. It had consequences with coach Sumlin and my teammates and everyone here in Aggieland. From that I've had to make changes in my life."
Less than six months after his arrest, Manziel has helped the Aggies to their best season since 1998, and made Texas A&M one of the top teams in the nation after last year's disappointing 7-6 finish.
He's proud to have helped put the Aggies back in the spotlight and knows winning the Heisman would only add to it.
"To bring a Heisman Trophy back to Aggieland for all these fans since it's been so all these years since we've had a Heisman Trophy winner ... to really bring the excitement and really bring something positive back to Aggieland would be something that is truly an ultimate goal," he said.
He's got a fan in Peterson, who ran for an NCAA freshman record 1,925 yards at Oklahoma in 2004 and believes the only reason he didn't win the Heisman was because he was a first-year player.
"It's sad when you think about it, because the Heisman goes to the best player in the country so the voters shouldn't look at it and go over what they've done over their career," Peterson said. "If he's the best player that year? Then that's what it needs to be."