RG3 looks good; Manning looks OK; Mathews hurt

The Jeff Fisher era in St. Louis officially gets under way on Sunday, and its success or failure will hinge on the development of third-year quarterback Sam Bradford. Hear from the former No. 1 draft pick and Heisman Trophy winner on this morning's "NFL AM" starting at 6 a.m. ET. Tune into "NFL AM" Monday through Friday to get a head start on the day's football buzz.

Here's what else is on tap Friday:

» The hard luck continued for injury-plaguedSan Diego Chargers running back Ryan Mathews, who broke his clavicle on his first carry Thursday night.

» Philadelphia Eagles quarterback Michael hit his left thumb on a helmet Thursday night and appeared to be in much pain, but X-rays later were negative.

» Shannon Eastin made history on Thursday as the first female official in an NFL game, and her debut was largely uneventful. However, other officials weren't so fortunate.

» Our series of reports from all 32 NFL training camps continues as Albert Breer writes from Houston Texans camp.

» Gil Brandt checks in from the Show-Me State with reports on the Kansas City Chiefs and the St. Louis Rams.

» NFL Films analyst Greg Cosell breaks down the quarterback battle between Tennessee TitansJake Locker and Matt Hasselbeck.

» Get a head start on the NFL season: Buy preseason and regular season game tickets for all 32 teams from the official source.

» Happy birthday to Denver Broncos kicker Matt Prater, who turns 28 on Friday.

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