The Arizona Diamondbacks acquired All-Star pitcher Dan Haren from Oakland and traded major league saves leader Jose Valverde to Houston in separate swaps involving 12 players Friday.
Oakland also sent right-hander Connor Robertson to Arizona and received six players: left-handers Brett Anderson, Dana Eveland and Greg Smith; infielder Chris Carter; and outfielders Aaron Cunningham and Carlos Gonzalez.
The NL West champion Diamondbacks sent reliever Chad Qualls, infielder Chris Burke and right-hander Juan Gutierrez to the Astros.

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