Indianapolis Colts quarterback Peyton Manning, whose leadership ability was once questioned by a teammate, joined the fray between his younger brother Eli and the former Giants running back Tiki Barber, now a commentator for NBC. During a television broadcast Sunday night, Barber criticized Eli?s leadership skills. Eli fired back at Barber on Tuesday, and Peyton took a shot yesterday at former players who join the news media after their playing careers end and then criticize current players. ?Ex-players truly become ex-players right away, the No. 1 job is to criticize players,? said Peyton Manning, who had his ability to lead publicly questioned several years ago by the former Colts place-kicker Mike Vanderjagt. ?I?m pretty defensive of all quarterbacks. Eli is my brother. I?m very loyal to my family. I?d rather you criticize me. I don?t think anybody knows what it?s like to be a quarterback except a current quarterback. Sometimes former quarterbacks forget what?s it?s like. You cannot play quarterback at any level ? you?re in a leadership position. To do it for three years in high school, three years as a starter in college, taking your team to the playoffs ? you are a leader and you?re a good leader."