Joe EskenaziQuarterback Dion Pickett, formerly of College of San Mateo, drops back to pass at a Bay Area Buccaneers practice in San Francisco's Hamilton SquareFrom a distance you could hear them laughing and shouting -- a bunch of kids playing football in the park. But with every step closer to Hamilton Square it becomes readily apparent that these are not kids. They're too big and too strong; wide receiver Chris King's biceps bulge as the pass from Dion Pickett hits him in the hands. They're to