In February 1903, his teammate Rat Westwick married Duval's sister Ruby.

[2] After two seasons with the Victorias, Duval joined the Pittsburgh Pros of the International Professional Hockey League for 1904–05.

Duval had been acting in an unusual manner in the weeks previous, and had been drinking heavily.

The reason for the heavy drinking was not fully disclosed publicly, however, a letter arrived at his boarding house after his death from his sister, advising Duval that the "girl and the baby were doing well and that he should not be downcast.

[6] A Pittsburg Press newspaper report at that time said that "'Peggy' when in condition can hold his end up with any of them, but the wine when it is red seems to have a fascination for him, hence his downfall.