The Marlins signed Jai Miller to a $250,000 bonus in 2003, and he spent seven years with the organization, compiling a career minor league line of .239/.324/.397 with 74 home runs in 2372 at bats. He appeared in just one game with the big league club in 2008, striking out in his only at bat.
Last season, Miller had the best year of his career at the Marlins' Triple-A affiliate in New Orleans, where he hit .288/.358/.512 with 16 home runs in 340 at bats.
Miller failed to make the Marlins' 25-man roster this spring, and he was designated for assignment on April 3. Five days later, the Oakland A's claimed Miller and optioned him to Triple-A Sacramento, where he hit .118 (4-for-34) in 10 games with the River Cats this season. Oakland designated the 25-year-old centerfielder for assignment on Thursday.