The injury happened on the last play of the game when he threw a touchdown to CeeDee Lamb, as the quarterback told reporters that he "came down funny."
Prescott discussed the injury further after Dallas' 35-29 victory, per Archer:
"Life keeps throwing punches, and I'm going to keep throwing them back. It's a part of it. It's part of this game. It's a physical game we play. I'll be fine. I've got a lot of confidence in myself, the medical team. I feel good. Obviously, this [the boot] is a precaution. But, yeah, I mean, just more so thinking about the touchdown, it doesn't hurt as bad obviously when you score and win the game."
The 28-year-old has been dealing with a shoulder issue throughout training camp and missed much of the Cowboys' preseason. The problem compounded his rustiness as he attempts to return from the devastating leg injury that cost him most of last season.
"I've got to keep progressing the right way," Prescott told reporters in August. "As long as I don't have any setbacks, when we get to that crossroads we'll obviously talk to the doctors, coaches and figure out what's best."
The Mississippi State product has looked so sharp so far, but it's fair to be concerned with his overall health. He was on pace to reset the passing record book before going down in 2020; there's optimism that the Cowboys are a playoff team with a healthy Prescott.
Unlike last season, there is no quality backup waiting to take over if Prescott misses time. Cooper Rush and Will Grier are the only other quarterbacks listed on the depth chart.