The door to The Show opened for a few of baseball’s top prospects with the expansion of the active roster on September 1.
The Detroit Tigers wasted no time promoting outfielder Nick Castellanos, as the team purchased his contract from Triple-A Toledo before Sunday’s game and managed to get him a pair of at-bats in his big league debut.
Meanwhile, the Cincinnati Reds ultimately decided to promote Billy Hamilton with the hope of using his elite speed in some capacity over the final month of the season. Sure enough, the 22-year-old wasted no time making an impact. After entering the game as a pinch runner in the seventh inning, he proceeded to steal second base—against Yadier Molina nonetheless—before coming around to score on a double by Todd Frazier. He accounted for the Reds' lone run in their 1-0 win over St. Louis.
Both Castellanos and Hamilton have been ranked as consensus top-50 prospects in each of the last two seasons. Therefore, it shouldn’t come as a surprise that they both have the ceiling of a future All-Star. However, they aren't the only call-ups with All-Star potential.
Here’s a look at the odds of MLB’s top September call-ups eventually becoming All-Stars.