Aaron Colvin had something of a forgettable first season in Houston. An ankle injury limited him to only 10 games in the regular season http://www.bengalsauthorizedshops.com/authentic-drew-sample-jersey , and he ended up being a healthy scratch for the postseason game.The nickel corner played 317 defensive snaps and 26 on defense after signing a four-year, $34 million contract with $18 million guaranteed. He made 29 tackles and one pass breakup.It’s not what Colvin or the Texans expected.“I’m pretty disappointed with how it went on the field, but it was a great year for me because I experienced a lot of things I never experienced before,” Colvin said, via Aaron Wilson of the . “I grew a lot as a person and I’m thankful. I always come back strong.”With Bradley Roby and Lonnie Johnson Jr. sidelined for most of the spring http://www.oaklandraidersteamonline.com/trayvon-mullen-jersey , Colvin took advantage of his reps. But he still will have to compete in training camp to win a job.“We’ve got a lot of guys at his position that he’s competing with and he knows that, but he’s been great,” secondary coach Anthony Midget said. “He’s been here all offseason. He’s been working hard and I’m excited to see him in camp competing.” When we think of quarterback play in the NFL, our minds jump to players like Peyton Manning, Tom Brady http://www.oaklandraidersteamonline.com/isaiah-johnson-jersey , and Drew Brees. We imagine beautiful spirals, precision deep throws, and a full understanding and execution of some of the most complex offenses in the game.The trouble is, of course, that there are 32 NFL teams and only one Tom Brady. Not every team can have an excellent quarterback behind center http://www.oaklandraidersteamonline.com/hunter-renfrow-jersey , some just have to struggle to get by.So some teams get to start future legends behind center. Others get good, solid quarterbacks who may not end up in the Hall of Fame one day, but can win games in the NFL. Others have average quarterbacks they have to gameplan around, and yet others have poor quarterbacks who limit what their teams can really do.And then there’s this lot.There are some quarterbacks who have put up numbers so awful that they tanked their team’s chances of contending before the season ever really got going. There are some quarterbacks who just were not ready for an NFL debut and were thrust into action too soon. Every quarterback goes through growing pains at first—remember, Brady was a third-stringer in his first year and Peyton Manning’s first team went 3-13—but some quarterbacks simply haven’t lived up to what they need to do to succeed in the NFL.We’re looking at the 15 worst quarterbacks of the past 15 years. Obviously http://www.seattleseahawksteamonline.com/marquise-blair-jersey , the truly worst quarterbacks are the ones that never see the field, but we’re looking more for the players who did the most harm on the field. We’re looking for the quarterbacks just good enough to be trotted out start after start or even year after year, but bad enough to make us all cringe and look away. Without further ado…