After beginning 2008 with Triple–A Richmond, Bueno was called up to the majors on August 3 and made his debut on August 13, during which he nearly hit Alfonso Soriano in the chin, only innings after Soriano show-boated after hitting a long fly ball off Bueno, jumping and celebrating out of the box, only to be left with a single as the ball bounced off the left field wall.

Bueno will appeal the fine and suspension, and will only have to serve his final sentence once he returns to the Major Leagues.

The situation escalated in the final game of the Braves-Cubs series, when Ted Lilly hit Escobar, prompting a shouting match between the two, and the benches and bullpens to clear, but no fight took place, nor ejections made.

On August 5, 2010, Bueno signed a contract lasting until the end of the season with the Hanwha Eagles of the KBO League.

He signed a minor league contract with the Kansas City Royals in 2012 and was assigned to the Omaha Storm Chasers before called up on June 23.