Grand Rapids— Retired baseball star Derek Jeter says lessons from his parents are behind a successful career that saw him play in 20 seasons for the New York Yankees.

The Grand Rapids Press reports Jeter spoke Tuesday night at an annual dinner for The Economic Club of Grand Rapids, taking questions from columnist and baseball aficionado George Will.

Jeter said his parents made him and his sister abide by a code of conduct if they wanted to play sports. He graduated from Kalamazoo Central High School in 1992 and was drafted that year by the Yankees.

Jeter also told the audience that he would add the designated hitter to the National League rather than have pitchers bat, and that his greatest fear was “not being prepared.”