At Qualcomm Stadium, Harry Wendelstedt and his son, Hunter, become the first father-son combination to umpire a major league baseball game together. Dad is behind the plate calling balls and strikes, and his son, who will remain on the same crew for the remainder of the season, makes the calls at third base when the last-place Marlins beat the first place Padres, 3-2.

This Day In Baseball

On August 10, 1998 — At Qualcomm Stadium, Harry Wendelstedt and his son, Hunter, become the first father-son combination to umpire a major league baseball game together. Dad is behind the plate calling balls and strikes, and his son, who will remain on the same crew for the remainder of the season, makes the calls at third base when the last-place Marlins beat the first place Padres, 3-2.

Source:
Baseball Reference August 10
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game