Castellanos leads the league with 78 runs scored and is second with 140 hits and 36 doubles.
"He should be coming out as a junior in college. To do what he's done each day at this level, at that age, is impressive," Toledo manager Phil Nevin said earlier this month. "I'm tired of people trying to compare him to [Mike] Trout and [Bryce] Harper and guys that have come up early. There's different development for different guys. He's going to be just as good as these guys, in my opinion."
Jason Beck is a reporter for MLB.com. Read Beck's Blog and follow him on Twitter @beckjason. Bobby Nightengale is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.