Next Man Up

<p>In the NFL there is only one certainty: that every day, someone will have to be the Next Man Up. Football is an unrelentingly punishing sport, played and practiced at undiminished intensity, and it devours its players. Confronting injuries, trades, and the grim reality of competition, every NFL team prepares constantly for the likelihood -- the certainty -- that even franchise players can go down at any time. And someone new must be ready, trained, and primed to step in at the highest level.<br><br>Bestselling sportswriter John Feinstein persuaded one NFL team to lift the extraordinary secrecy that shrouds the sport and let him see how a team operates at the closest level. One team let him join every practice, every coaches'' meeting, every players'' gathering, every strategy debate. From the give-and-take of draft day, into the grinder of summer training camps, and from 100-degree practice games to the last game in frigid conditions, Feinstein reveals how a football team works -- o