Dumas was summoned from the minor leagues to back up Tony Esposito for Chicago's game against the Atlanta Flames on February 23rd, 1975. The Hawks, with Tony O in net, held a firm 4-0 lead when Esposito's glove developed a tear. In those days referees didn't allow stoppages for such equipment repairs. The back up goaltender had to come in.
So Dumas went in, for about a minute, and then returned to the bench when Esposito's glove was mended. But because Dumas played that one minute, he shared a shutout with Esposito in Dumas' very first NHL game!
Dumas was a minor league standout who never got a chance to fulfill his potential in the NHL. He suffered a career ending eye injury in 1976. He played in only 8 NHL games in his career.