He was named Kentucky's "Mr. Baseball" as a high school senior.
Three years later, he could be ready for the pro game as a solid middle infielder.
Riddle is a hot commodity -- a left-handed hitting middle infielder -- but the question remains just how much he'll hit after hitting .283 in his three years at Kentucky.
He does have a compact swing and if he can add some strength, there might be a little power coming.
He showed off his ability to make good contact and put the ball in play as a junior, striking out only 14 times in 245 plate appearances.
He runs well enough, but isn't a real threat to steal. Riddle plays second base now, but could handle shortstop at the next level and he could be looking at a future as a utility player.
Joe Morgan is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.