JAMESTOWN — I can still see my father jumping. It was Sept. 1, 2002, at the Oakland Coliseum, and Miguel Tejada had just launched a three-run walk-off home run to give the Oakland Athletics their 18th consecutive win during that magical run to 20 straight victories. The concrete structure shook. Strangers hugged. The A’s poured out of the dugout. And somewhere in the middle of it all, my dad, a former Marine and 36-year Bay Area police officer, …