Marcelo Mayer, Boston’s No. 2 overall prospect, was promoted to the Red Sox and needed to get a ride to Fenway Park to start against the Baltimore Orioles on Saturday.

Mayer talked days before his callup about how he woke up every day imagining what it would be like to get called up. He no longer had to wonder.

You're rushing out the door, already late for your destination, when you realize a critical part of your departure is missing—your car keys have vanished. Now imagine that happened on the way to your big league debut,