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As to your question, it really depends on the school he is attending. Many schools have JV programs with active schedules. Depending on a lot of factors, several freshmen contribute as varsity regulars or even starters as the season progresses. Again, a lot depends on the school he is attending.
On another note, I saw the Del Val/Ursinus scrimmage today. Del Val's offense was a little slow at first and kept things pretty basic in terms of what they ran. The first team unit scored 10 points with Knoblauch at the helm and 7 with the new back-up Hassenauer running things. The reserves for both schools scored TDs in the second half.
Beyond the "score" (24-7 Del Val), which doesn't mean a whole lot, the Aggies looked alright on offense with Knoblauch getting in a rhythm near the end of the first half.
Billman's pride-and-joy did a nice job, hitting a 37-yard field goal and going 3-3 on PATs. And the defense was pretty solid, though it's hard to tell how much was their good play and how much was Ursinus still struggling to find its way.
All in all, a decent showing -- I think last year's scrimmage in Collegeville had a similar "final."