The High Roller megabuck bowling tournament has come to mean many things to many people over the past 24 years. For David Ozio, named Rookie of the Year on the PBA Senior Tour last year, it meant a thrilling finals victory over Jason Belmonte, reigning international amateur of the year, in the championship match Thursday and a $21,000 check. "If there is a better word than ecstatic to describe my feeling right now, I can't think of it right now," said the 50-year-old PBA Hall of Fame bowler."