Five things I learned this weekend

Updated: September 18, 2011, 9:00 PM ET
By Jamie Newberg
Five things I learned this weekend:

Underclassmen impress
After watching four weeks of high school football, the three top prospects I have seen so far are all underclassmen -- Robert Nkemdiche (Grayson, Ga./Grayson), Antonio Conner (Batesville, Miss./South Panola) and Jabrill Peppers (Ramsey, N.J./Don Bosco).

Nkemdiche, 6-foot-5 and 265 pounds, will likely be among the top prospects in the country next season. The defensive end has size, speed, power, quickness and a non-stop motor. He's relentless and one of the top prospects I have ever seen in 20 years of covering recruiting.