Before Bo Jackson and Deion Sanders, there were only nineteen men who played in the Major Leagues of baseball and in the NFL in the same season. Only one, Walter French, played for a World Series winner and an NFL Championship team. Little remembered today, his status as a two-sport star had him constantly in the news.

Viera, Florida, has been the spring training home for the Washington Nationals since the team's inception in 2005 and author Jim Maggiore has made the sojourn to Florida every year to watch the team...