For now, there’s no reason to believe he isn’t. Time — and the injury reports to be released this week — will tell.
It’s unknown at this point whether he’ll have an MRI or any diagnostic procedures. If he doesn’t, then he truly is fine and it will be a non-issue for a team that suddenly has more than a few injury issues.
If all is not well, it will be ever harder for the Patriots to do what they want to do offensively. Eventually, these injuries will reach a critical mass.