Former RiverDogs Jorge Mateo, Dustin Fowler traded to A's in deal that sends Sonny Gray to Yankees, Sports
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A's acquire three prospects for Sonny Gray
New York Yankees: Meet the Next Dazzling Crop of Baby Bombers
Oakland A's prospect watch: Sonny Gray trade package has risk but huge upside - Athletics Nation
Jorge Mateo Stats & Scouting Report — College Baseball, MLB Draft, Prospects - Baseball America
New York Yankees: Meet the Next Dazzling Crop of Baby Bombers
Comparing the Gerrit Cole and Sonny Gray trades - Athletics Nation
Yankees Acquire Sonny Gray - MLB Trade Rumors
The Farm System That Fueled The Yankees' Surprising Success [2017 Season Review] - River Avenue Blues