Baltimore Orioles shortstop Jackson Holliday, the undisputed top prospect in baseball, is performing well in Double-A, and suddenly there's plenty of chatter about his big-league debut. While some top prospects go straight from that level to the big leagues (Nolan Schanuel, the Los Angeles Angels' first pick in this year's draft, debuted last week), that's probably not happening for Holliday this year.
But thanks to a rule in the new collective bargaining agreement that incentivizes teams to take the plunge and call up their best young players (and discourages them from service time manipulation), nine top prospects did make the jump to the big leagues last week.