The A's are poised to trade highly touted third base prospect Brett Wallace to the Toronto Blue Jays in exchange for outfielder Michael Taylor, a source confirmed to the Bay Area News Group.
But first, other pieces must fall into place regarding the blockbuster three-way trade that would send pitcher Toronto ace Roy Halladay to the Philadelphia Phillies and Phillies lefty Cliff Lee to the Seattle Mariners.
Taylor, a top-rated prospect for Philadelphia, would first have to be shipped to Toronto as part of that deal before being flipped to Oakland for Wallace.
Details involving Halladay, who needed to pass a physical Tuesday and reportedly is negotiating a contract extension with Philadelphia, are thought to be holding up the A's trade.
There's no timetable for when Oakland could make an announcement.