"At this particular point in time, sir, I'm full go." Newton told reporters.
Newton hasn't been fully healthy in a few years, having played only 16 total games over the last two seasons. He underwent shoulder surgery in January 2019 and foot surgery this past December.
As he embarks on a comeback tour with the Patriots, the 2015 MVP appears ready to reclaim his spot among elite quarterbacks.
From a financial standpoint, there's plenty riding on Newton's health as well.
If he plays 90 percent of the season for the Patriots, he'll earn $2.25 million on top of his base salary. He can get up to $1.5 million more if the team makes the playoffs. Newton could also earn an extra $500,000 for being named to each of the Pro Bowl and All-Pro team.
As much as the money is a strong motivator, Newton says he has very few people to impress along the way.
"I don't have to prove nothing," Newton said. "Especially not to nobody. I have to prove to myself. That's a daily challenge. ... I'm just looking forward to the challenge."
The first test has already begun. Newton is working on learning a new offense and competing for the starting job with Jarrett Stidham. Should he win the right to lead the offense into Week 1, it'll kick off what will likely be one of the most fascinating comeback attempts in the league.
Bettors across the sport are already expecting that to play out well, with Bovada listing Newton as the favorite to win AP Comeback Player of the Year at +300 (bet $100 to win $300) alongside Pittsburgh Steelers quarterback Ben Roethlisberger.