He'd like to know where men 18 to 34 have gone from his network's NASCAR Sprint Cup Series telecasts.

If you see any of these young male viewers, please have them call David Hill, the chairman and chief executive officer of the Fox Sports Media Group.

Hill doesn't have clue where they went. All he knows is they are gone. And he's concerned.

"The biggest problem facing NASCAR is that the young males have left the sport," Hill told scenedaily.com.

"And if I was NASCAR, and I was an owner, it would be something that I would be burning the midnight oil on a nightly basis, worrying where they've gone and how do I get them back."

Fox Sports' 13-race portion of Sprint Cup competition this season concludes Sunday with the Coca-Cola 600.

Through 12 races on Fox, Sprint Cup ratings are down 4% compared with last year but are down a whopping 29% among young men. That's a troubling development for a sport that has attracted that segment and delivered them to advertisers.

Starting in 2007 and ending in 2014, NASCAR's television partners will pay out $4.5 billion in rights fees.

Now, this same demographic has left other televised sports in recent months but not as dramatically as in Sprint Cup.

Baseball on Fox is down 18% among men 18-34; their numbers are down 14% for the PGA Tour on all networks, down 13% for baseball on ESPN, down 11% for the NHL playoffs on NBC and 20% on Versus, and down 7% for the NBA playoffs on both ABC and cable.

One network's analysis of this development suggests that this age bracket leads all groups in curtailing its television use in all times of the day.

"With the average American home now receiving well over a hundred channels, it's impossible to identify a single destination for these wandering young men," the report says.

"As for the moment they are dispersing across dozens of channels and other media platforms."