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when did Rick Barry join oakland
After the 1966–67 season, Rick Barry became one of the first NBA players to jump to the American Basketball Association when he signed with the Oakland Oaks.
what did Rick Barry achieve with the Oakland Oaks
During the 1968–69 season, Rick Barry suited up for the Oaks and averaged 34 points per game. He also led the ABA in free-throw percentage for the season

Question: where did he come from
Self-contained rewrite: where did Rick Barry come from before signing with the Oakland Oaks?