When ESPN NBA insider Adrian Wojnarowski announced his retirement Wednesday to become the general manager of St. Bonaventure's men's basketball team, a word frequently used to describe him—explicitly or implicitly—was irreplaceable.

Adrian Wojnarowski, who has been ESPN's leading reporter on the NBA for seven years, is retiring to take a job at his alma mater, St. Bonaventure.

By leaving his role, Wojnarowski is walking away from $20 million with ESPN, multiple people briefed on the move said.