The 5-foot-7 reliever hasn't pitched in a meaningful game since the 2014 World Series, and he might not this season either, but he plans to be a National.

WEST PALM BEACH, FL - FEBRUARY 18: Washington Nationals pitcher Tim Collins (55) fields a pop fly during fielding drills at the Ballpark of the Palm Beaches in West Palm Beach, Fl on February 18, 2017. (Photo by Jonathan Newton/The Washington Post)

Trying to mke the Nationals, Brett Carroll is learning how to play catcher in case of emergency.