sentences:  During his first three years in the minor leagues, "Baseball America" also ranked parts of Heyward's skill sets as the best among Braves minor leaguers, including Best Strike Zone Discipline (three times), Best Hitter for Average (twice), Best Hitter for Power (once), Best Defensive Outfielder (once), and Best Outfield Arm (once).The Braves added Heyward to their 40-man roster before the 2010 season.After a rapid ascent through the minor leagues, the Braves invited Heyward to spring training in March 2010.