There's a rule in August: Never overreact to the preseason.Having said that, you can learn things by watching closely. Preconceived notions can be proven right or wrong. You can identify harbingers of things to come.And yes, we occasionally break the rule by overreacting. (Nobody's perfect.)Here are my biggest observations from Week 1 of the NFL's preseason, Schein Nine style:1) Philly left searching for Big FootAs regular readers of this column know, I call "Big Foot" because I've heard rumors about the oft-injured former No. 1 overall pick being a franchise quarterback, but -- like the mythical beast -- I never actually see it. Chip Kelly did the smart thing, for the ' preseason opener. While Bradford has looked good and healthy in recent weeks, you just can't subject him to too many live hits before the regular season.Having said that ... fans got a glimpse of how things will go if Bradford gets hurt, and it wasn't pretty. had a big-play opportunity on Philadelphia's first offensive snap, but he underthrew tight end , who was 5 yards clear of the nearest defender. In drive No. 2, Sanchez overthrew on a would-be touchdown strike. All in all, Sanchez finished an erratic 2-for-7 with 52 yards pa sing and a touchdown. And honestly, that stat line, though underwhelming, actually looks much better than it should. Sanchez's was actually such a wretched throw that it lured the pick-hungry cornerback out of position; Agholor made a fantastic play on the ball and scampered all the way to the end zone.Look, I've seen the movie many times. I know how it ends. So do fans, who saw the signal caller come up short in a season-crushing, three-game losing streak to Seattle, Dallas and (gasp) Washington last December. Meanwhile, is , is . (See: non-answers at the position.) Thus, Kelly desperately needs Bradford's best ability to be his availability in 2015.Overall, I really like what Kelly did this offseason, revamping the roster in an aggre sive -- but largely wise -- manner. If Bradford Brenton Cox Jr. Jersey is healthy, I like the to win the NFC East. But I acknowledge that's a major roll of the dice. And if Bradford isn't healthy -- if Philly doesn't get solid play at the game's most important position -- the extreme makeover falls flat.2) White makes Bears blueThe one thing every single NFL coach desires most in the preseason when it comes to his players: good health. With that as a backdrop, the suffered a crushing blow to their already-slim chances for rebirth under new bo s John Fox in 2015. The announced Saturday that after developing a stre s fracture in his shin. The dynamic wideout first felt the pain in June OTAs. Rest and therapy didn't cure it. The No. 7 overall pick will begin the season on the physically unable to perform list and could mi s his entire rookie campaign.Oof. This development solidifies Chicago's role as the bottom feeder in an otherwise-competitive NFC North.As stated before, I can't see how 's dispirited demeanor will jibe with Fox's infectious energy. And White being sidelined for the foreseeable future certainly isn't going to help No. 6's morale. Looking at the other side of the ball, Fox and defensive coordinator Vic Fangio have plenty of work to do. The first-team defense was surgically dismantled in the opening drive of the preseason by and the . : "It's a good little slice of humility and it lets you know where you are at and things you can work on."3) Teddy Time is nigh!Speaking of the otherwise-competitive NFC North ... was hyped because it was the "debut" of . And if you did indeed tune in to see impre sive play by a promising young pa ser, you weren't disappointed: stole the show.The signal caller came out in midseason form, completing seven of his eight pa ses for 86 yards. And for those who paid attention to the second-year pro's debut season, this can't count as a surprise. Teddy rocked steady in his rookie campaign -- sans after Week 1 -- improving as the season went along. Over the final five weeks of 2014, Bridgewater completed 72.1 percent of his pa ses and posted a 103.0 pa ser rating.I think Bridgewater gets even more comfortable in Year 2 with fine offensive coordinator Norv Turner and enjoys a big season. , I think Mike Zimmer's can be akin to the Golden State Warriors. No, they're not going to win the , but these Vikes are young and exhilarating. I believe Minnesota, with Peterson back in the fold, is a playoff team.4) Fear Ameer, I wrote that was one of the true risers in NFL training camps. On Thursday evening, . Showing off speed, power, vision and awe-inspiring lateral quickne s, the ' second-round pick shredded the for 67 yards on just seven carries -- including . After the game, New York coach Todd Bowles : "He's quick as a cat. He's about as quick as Barry Sanders. I'm not saying he is Barry, but he's a good running back."As I've said many times on SiriusXM this offseason, I think Agholor, Abdullah and are the top three candidates for Offensive Rookie of the Year. Abdullah should get 20 to 25 touches a game for Detroit. should not be an option to start.5) Full deck of CardsDon't sleep on Arizona. Bruce Arians' team won 11 games last season and made the playoffs despite a wave of injuries that would've buried most teams. So what happens if this squad can stay relatively healthy in 2015? It's an enticing question. looked splendid in a brief appearance , completing all four of his pa ses for 77 yards. looked healthy and showed sizzle -- particularly on . also appeared to have a clean bill of health, on the ' opening drive.The have the top head coach-general manager combo in the NFL today. And I think Arizona is the third-best team in the NFC, behind Green Bay and Seattle.6) Garoppolo ... Yikes!I like . I blasted teams like St. Louis for bypa sing him in the 2014 . I think he has a future in this league. But man, Jimmy G was brutal . Garoppolo completed 20 of his 30 pa ses for just 159 yards, with zero touchdowns and one interception. Oh, and he took seven sacks, for good measure. The second-year signal caller didn't display much awarene s; consequently, the Pats fielded a pop-gun offense.With 's status still up in the air for the season's first quarter, Pats fans have to be champing at the bit for an appeal decision from Judge Richard Berman. If Garoppolo is under center , will the beat the ? I originally thought they would. Now? I need to see more ...7) No ordinary Joe in BaltimoreI like the to win the AFC North in 2015. And while I acknowledge the superb job Gary Kubiak did as the offensive coordinator last year, the club shouldn't mi s a beat with Marc Trestman taking over the reins. and the ' first-team offense looked like a well-oiled machine , opening up the preseason with a 16-play, 80-yard touchdown drive. Flacco even busted out a 17-yard run!The quarterback quietly posted a career-high 27 touchdown pa ses last season. In the postseason, he and then in New England. Flacco's name never comes up in the elite QB conversation, but do not overlook this cat in 2015.8) Mariota and Winston look like ...Rookies!For both young quarterbacks, there were moments of futility and moments of promise.I did like bouncing back after (which was somewhat shocking, considering his pick-free training camp). Meanwhile, I was alarmed by Bucs coach Lovie Smith calling his new QB's debut a If that's true, that's a huge problem.9) Rams running amokThe have talent -- especially along the defensive line -- spawning playoff chatter around St. Louis. But in , Jeff Fisher's team committed 10 penalties and put three points on the board. The ' starters looked a bit lost and punchle s.Yes, it's the preseason. But when you play in the NFC West with the mighty and , there's little margin for error. This team hasn't finished above .500 since the 2003 campaign -- and Friday's sloppy effort showed why.Follow Adam Schein on Twitter . TJ Moore Jersey