Aug 31 (Reuters) - Peyton Manning returns to work next weeklooking to reassert his credentials as the gold medal standardfor National Football League (NFL) quarterbacks after pacing thesidelines last season recovering from a fourth neck surgery. But the NFL landscape can change quickly and Manning may noteven be the best quarterback in his family anymore with youngerbrother Eli making a case for that status after leading the NewYork Giants to a second Super Bowl title in four years. ...

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