• Red Sox catcher Luis Exposito provides a big target behind the plate for his pitchers, and the 22-year-old looks even bigger than his listed height and weight of 6-foot-3, 210 pounds. He threw out just three of 21 basestealers in the AFL, but he generally receives solid marks for his defensive tools. Though he doesn't swing and miss excessively, scouts have some concerns about the length of his swing, and the scouting consensus is that he's likely a backup at the big league level, with the potential to work himself into a starting role.

"Exposito is extremely physical, extremely strong and he has a great arm" said Mesa manager Brandon Hyde, who managed the Marlins' Double- A Jacksonville affiliate this summer. "He could be a power bat that could be a good catch-and-throw guy behind the plate."