Tanner returned to his Western Pennsylvania roots when he was traded by the A's to the Pittsburgh Pirates for Manny Sanguillén and $100,000 on November 5, 1976. He succeeded the recently retired Danny Murtaugh as Pirates manager. This was the second instance in major-league history where a manager has been part of a baseball trade (Joe Gordon and Jimmie Dykes were traded for each other in the 1960s; Lou Piniella of the Seattle Mariners was traded to the Tampa Bay Devil Rays almost 30 years later). However, Sanguillén would be traded back to the Pirates in .