Ken Griffey Jr. mentoring young players at Hank Aaron Invitational

VERO BEACH, Fla. — Ken Griffey Jr. practiced diving catches on his bed and jumped off the diving board into the pool, imagining himself making the play while growing up.

He visualized the perfect catch, run, pitch and swing.

That was one of the biggest pieces of advice he shared with the audience of high school-age players gathered at the Jackie Robinson Training Complex during Week 2 of this…