For the first time in the 20th century, two starting pitchers in major league baseball share the same name as the Colorado Rockies’ lefthander Bobby M. Jones faces righthander Bobby J. Jones and the New York Mets at Coors Field. B.M. defeats B.J. and the Mets, 8 – 5.

On May 11, 1999 — For the first time in the 20th century, two starting pitchers in major league baseball share the same name as the Colorado Rockies’ lefthander Bobby M. Jones faces righthander Bobby J. Jones and the New York Mets at Coors Field. B.M. defeats B.J. and the Mets, 8 – 5.

Source:
Baseball Reference May 11