Slideshow: Sights from the first day of Nike's The Opening 2013

Fans and players look on as an athlete runs the 40-yard dash during the SPARQ Rating National Championships on Monday at Nike World Headquarters in Beaverton, Ore.

Green Bay Packers quarterback Aaron Rodgers (center) chats with former NFL player Trent Dilfer (left) during the Nike training camp Monday morning.

Devante "Speedy" Noil, of Edna Karr (New Orleans), competes in the 40-yard dash during the SPARQ finals.

Lineman Brian Allen (left) of Hinsdale Central (Ill.) receives instructions before competing in the kneeing power ball toss during the preliminary round of the SPARQ Rating National Championships.

Quarterback Jerrod Heard, of Guyer (Denton, Texas), drops back to pass during Monday's training camp.

Cornerback Kevin Alexander (left), of North Little Rock (Ark.), celebrates with Michiah Quick, of Fresno Central (Calif.), after making a play during training camp.

Players look on as Tony Brown, of Ozen (Beaumont, Texas), competes in the agility shuffle during the SPARQ finals.

Defensive lineman Da'Shawn Hand, the top recruit overall in the Class of 2014 from Woodbridge (Va.), speaks with a MaxPreps videographer.