Teams got an early start on preparations for Week 1 on Monday. Bill Belichick called it a normal "Wednesday" for the team because it was a full, padded practice.
With teams starting early, we got an early read on what players will be available in the season opener. Eight nuggets to know:
1. ESPN reported via a source that Pittsburgh Steelers safety Ryan Clark would not play in Denver because of the health risks of playing at high altitude. Clark has a sickle cell trait. We essentially knew this when they announced the schedule. Clark was held out of Pittsburgh's last two games in Denver, including their playoff game in January, and coach Mike Tomlin confirmed Tuesday morning that Clark "obviously" won't play against the Broncos on Sunday.
3. Oakland Raiders wide receiver Denarius Moore (hamstring) and Jacoby Ford (foot) continue to miss practice. Moore seems to have a better chance to play in Week 1, even though he missed the last month.
Follow Gregg Rosenthal on Twitter @greggrosenthal.