Justin Fields teams up with other Chicago sports star for their newest sponsorship

"That's the cool thing about C4," Fields said. "It's not just a physical thing where you use preworkout, but they also have drinks to maximize your mental capacity, too. So when I'm having a hard workout and I still have two hours of meetings left to go, I usually drink one of those, and it keeps me locked in. So it's awesome being able to work with a company that treats both physical and mental health."