The Notre Dame football team is showing a ton of energy so far in camp.

Irish coach Brian Kelly, however, is a little worried what the season opener in Ireland against Navy could do to his guys over the long term.

Notre Dame will play at 9 a.m. South Bend time.

I think we have to be very smart with how we get the proper rest, because quite frankly what I'm more concerned with, it's the opener. Those guys will play it at 2am. What I'm worried about is sleep, loss of sleep, and a cumulative fatigue factor that bites us three, four weeks down the road," Kelly says. "So my concerns are more in not just one game but three or four weeks. For example, we didn't get up at 6:00 in the morning for camp. We pushed the schedule back a little bit. I want to make sure our team is fresh so we don't feel the effects of it later."

The season opener is September 1st.