VIERA, Fla. - The Nationals had no idea what to expect when they signed Sean Burnett to a minor league contract in November. As much as they hoped they'd get the guy who established himself as one of baseball's best left-handed relievers during his first stint with the organization from 2009-12, reality suggested it was a long shot.
Burnett, after all, had appeared in only 16 major league games since departing from Washington more than three years ago, none since May 27, 2014, when elbow pain...
