The 1907 ECAHA season was the second season of the Eastern Canada Amateur Hockey Association (ECAHA). Teams played a ten-game schedule. The Montreal Wanderers won the league championship going undefeated, with their only loss of the season coming in a Stanley Cup challenge series with Kenora.
A major battle took place for the game between the Senators and Wanderers on January 12. Stick work was the order of the day as Charles Spittal of Ottawa knocked Cecil Blachford in the head, Alf Smith hit Hod Stuart in the head and Harry Smith broke Ernie Johnson's nose. The Wanderers would still win, 4–2.
After the game, a special league meeting was called to hand out discipline, with Victorias and Wanderers wanting Spittal and Alf Smith suspended for the season. The players were not suspended, leading the league president Mr. McRobie to resign, leaving Darcy McGee to take over as president.
On the next visit of the Ottawa team to Montreal, to play the Victorias, the three Ottawa players were arrested by Montreal police. Eventually Alf Smith and Spittal were fined $20 for their actions and Harry Smith was found not guilty.
The scoring championship was close, with Ernie Russell of the Wanderers placing first with 42 goals in 9 games, and Russell Bowie scoring 38 in 10 games.