Before listing the three National League outfielders destined for breakout seasons, its best to define what I classified as a breakout candidate. I decided to choose players that fantasy owners have seen on the waiver wire over the past few seasons. Perhaps these players have even found their way onto a roster or two.However, it is this upcoming season in which they will contribute to a fantasy team in a significant way for the first time. That means no rookies such as Nick Senzel or Victor Robl[...]