THE HAPPIEST Laker is the one whose father was addicted to heroin, whose mother died of colon cancer when he was 12, who attended three high schools, had his first college scholarship revoked before the fall semester of his freshman year, became a subject of three college investigations, declared for the NBA draft, tried unsuccessfully to pull out of the draft, was picked by arguably the worst franchise in sports, violated the league’s antidrug policy twice within eight months and after finally getting his life together, went home to New York City for an aunt’s funeral and wound up burying his 6½-month-old son, then getting robbed at gunpoint.