Challenge trades are straight-up, one-for-one deals, usually involving two guys who play the same position. The first such trade I can remember is the legendary My-Bobby-For-Yours deal of 1974 when the Giants sent Bonds to the Bronx for Murcer. The most legendary such deal is one that actually never happened, when (legend has it) the owners of the Red Sox and Yankees got their drink on and agreed to deal Joe DiMaggio for Ted Williams before both backed out the next, more sober day.
So here are your questions for the day ...