National Conference teams won three of the four interconference games against American clubs last weekend, but Buffalo's victory over Los Angeles clinched the 52-game series this season for the AFC for the seventh straight year and eighth time since the merger in 1970.

A survey of the ages of the quarterbacks suggests better prospects for the NFC in the future.

Only four in the NFC are 30 or older: Jim Hart, 36, and Joe Theismann, Archie Manning and Lynn Dickey, all 31.

In the AFC, Craig Morton is 37, Bob Griese 35, Ken Stabler 35, Jim Plunkett 33, Terry Bradshaw 32, and Brian Sipe, Dan Pastorini and Ken Anderson are 31. Joe Ferguson is 30.

Among the under-30 generation in the NFC, Ron Jaworski, Gary Danielson and Kim McQuilken are 29; Steve Bartkowski and Danny White are 28; Mike Kruczek is 27; Pat Haden, Vince Ferragamo and Steve DeBerg are 26; Doug Williams, Tommy Kramer and Phil Simmns are 25; Joe Montana and Vince Evans are 24 and Scott Brunner is 23.

Under age 30 in the AFC are Bert Jones and Dan Fouts, 29; Steve Grogan, Jim Zorn and Richard Todd, 27; Matt Robinson and Cliff Stoudt, 25; Matt Cavanaugh and Jack Thompson, 24; Steve Fuller, 23, and David Woodley, 22.