Not long ago, there was little doubt about which sport ruled and who was its golden king. But John Elway has gone, and the mighty Broncos have scuffled. Still, there's pigskin promise. Bob Griese's kid Brian -- going into his fourth season as a pro -- has developed the strength, savvy and leadership skills to lead the Broncos out of their two-year funk, but his durability remains the big question. When not riding the pine in 2000, Griese played hurt, sometimes heroically. But if he has to do it again, a pall may quickly fall on the big Invesco Field (IF) at Mile High. A healthy Terrell Davis in the backfield would vastly improve the value of Griese's stock -- and the team's.