With all this discussion of Profar, I am wondering, has the no. 1 ranked prospect ever been traded in MLB History? Not no. 1 for a team, but no. 1 overall in all of MLB. With the recent history of no. 1's (Buxton, Profar, Trout/Harper, Strasburg/Hayward, Weiters/Price, Bruce/Longoria, Dice-K/Gordon) none have been traded.
NOTE: I mean this before they made their MLB appearance. Not after they made the MLB lol.