1909–10[]
In an effort to freeze out the Montreal Wanderers, the ECHA disbanded in December 1909 and a new league called the Canadian Hockey Association (CHA) was formed, deliberately designed to exclude the Wanderers. While the Wanderers were forced to join the newly formed National Hockey Association (NHA), the defending Cup champion Ottawa HC still had to accept challenges. In January 1910, they played a two-game total goals series against Galt, champions of the OPHL, but prevailed with 12–3 and 3–1 victories. Marty Walsh led Ottawa with 6 goals.
| Date | Winning Team | Score | Losing Team | Location |
|---|---|---|---|---|
| January 5, 1910 | Ottawa HC | 12–3 | Galt | Dey's Arena |
| January 7, 1910 | Ottawa HC | 3–1 | Galt | |
| Ottawa HC wins total goals series 15 goals to 4 | ||||
Soon after the Galt-Ottawa challenge series ended, the CHA folded because of financial difficulties, and Ottawa was admitted into the NHA. The Senators then played a two-game total goals series against the Edmonton Hockey Club, but Gordie Roberts' 7 goals helped Ottawa to victories of 8–4 and 13–7.
| Date | Winning Team | Score | Losing Team | Location |
|---|---|---|---|---|
| January 18, 1910 | Ottawa HC | 8–4 | Edmonton Hockey Club | Dey's Arena |
| January 20, 1910 | Ottawa HC | 13–7 | Edmonton Hockey Club | |
| Ottawa HC wins total goals series 21 goals to 11 | ||||
When the 1910 NHA season ended in March, the Ottawas had to give the Cup to the Wanderers. Montreal finished in first place with an 11–1 record while Ottawa finished in second place at 9–3. The Wanderers then accepted challenge from the Berlin Dutchmen, who succeeded Galt as the OPHL champions. In the single-elimination game, Ernie Russell scored 4 goals as he led Montreal to a 7–3 win.
| Date | Winning Team | Score | Losing Team | Location |
|---|---|---|---|---|
| March 12, 1910 | Montreal Wanderers | 7–3 | Berlin Dutchmen | Jubilee Rink, Montreal |