As you know the Kansas City Chiefs placed three players in the 2011 Pro Bowl -- RB Jamaal Charles, WR Dwayne Bowe and G Brian Waters. They can be categorized into two young guys -- Charles and Bowe -- and one "old guy" -- Waters.
The league's labor website, NFL Labor, released some stats on the Pro Bowler starters this year. The caveat is that the Chiefs don't have any starters this year so it's not a fair comparison. But it's interesting to note where Charles, Bowe and Waters are, and where other Chiefs will be, relative to other Pro Bowlers.
The average starter has 7.1 years experience. Charles is in only his third year and Bowe is in his fourth year. Waters, on the other hand, is in his 11th year. I can think of multiple players on the Chiefs that are on the verge of the Pro Bowl that would be under seven years experience.
40 of 44 starters also have four years of experience. Only one of the Chiefs Pro Bowlers, Waters, has more than four years of experience. Running backs historically have short careers but I think it would be a good guess that Charles makes it back to the Pro Bowl next year, and he'll still be under four years of experience.
27 of 44 starters have at least seven years of experience. The Chiefs in the next couple years will likely start seeing guys from the '06, '07 and '08 draft classes into the Pro Bowl and they'll all be under that threshold.
The teams include one rookie starter, who was a first-round pick. Eric Berry was fifth in the fan vote at one time. Though we can't be certain, it doesn't sound like he's an alternate this year.