Defense

Learning many positions and not just sticking with the one you have played since t-ball is vital. Good examples are with Boston's Brock Holt (3b) & Mookie Betts (2b)  who are both rookies trying to break into the starting line up. Both players would not be playing in the bigs right now if they were not open to learning to play new positions.   Both are natural infielders but both are now playing the outfield for he Red Sox since they need a bolt of energy out their to jump start offensive production. Lesson: be open to learn and play as many positions possible cause u never know what position u may need to play one day.