| First Round |
| *advanced from qualifying rounds. All other clubs exempt from qualifying |
| Eastern Bracket |
| 1/14/28 |
|
Boston Wonder Workers |
3 : 0 |
Whittall Carpet Mills |
| 1/14/28 |
|
New Bedford Whalers |
2 : 1 |
J & P Coats |
| 1/15/28 |
|
New York Nationals |
6 : 1 |
I.R.T. Celtics (NYC)* |
| 1/15/28 |
|
Bethlehem Steel |
3 : 1 |
Centennial FC (Phi.)* |
| 1/15/28 |
|
Brooklyn Wanderers |
4 : 0 |
Trenton FC |
| 1/15/28 |
|
Fall River Marksmen |
5 : 1 |
MacKenzie FC (Niagara Falls)* |
| 1/15/28 |
|
New York Giants |
3 : 2 |
Newark Skeeters |
| 1/15/28 |
|
Providence Clamdiggers |
5 : 0 |
Danersk FC (CT) |
| Western Bracket |
| 1/15/28 |
|
Magyar American FC (Cle.)* |
2 : 1 |
Wellston FC (St. L) |
| 1/15/28 |
|
Gar Wood FC (Det.)* |
2 : 5 |
Bricklayers FC (Chi.) |
| 1/15/28 |
|
Morgan Haulers (St. L) |
3 : 6 |
Buda A.A. (Harvey, Ill.)* |
| 1/15/28 |
|
Canadian Club (Chi.) |
4 : 1 |
Tablers FC (St. L) |
| 1/22/28 |
|
Ben Miller SC (St. L) |
2 : 0 |
Swedish American FC (Det.) |
| 1/22/28 |
|
Walkerville (Ont.)* |
0 : 5 |
Holley Carburetor (Det.) |
| 1/23/28 |
|
Vienna FC (Chi.) |
1 : 0 |
Thistle FC (Chi.) |
1/22/28
|
|
Sparta A & BA (Chi.) |
2 : 0 |
Olympia FC (Chi.) |
|
|
|
|
|
| Second Round |
| Eastern Bracket |
| 1/28/28 |
|
J & P Coats |
1 : 0 |
Providence Clamdiggers |
| 1/29/28 |
|
Fall River Marksmen |
2 : 1 |
Boston Wonder Workers |
| 1/29/28 |
|
Brooklyn Wanderers |
1 : 1 (aet) |
Bethlehem Steel |
| 2/4/28 |
R |
Brooklyn Wanderers |
3 : 2 (aet) |
Bethlehem Steel |
| 2/5/28 |
|
New York Nationals |
2 : 2 (aet) |
New York Giants |
| 2/12/28 |
R |
New York Giants |
1 : 2 |
New York Nationals |
| Western Bracket |
| 2/5/28 |
|
Ben Miller SC |
2 : 1 |
Canadian Club |
| 2/5/28 |
|
Bricklayers FC |
4 : 0 |
Buda A.A. |
| 2/5/28 |
|
Magyar American FC |
5 : 2 |
Vienna FC |
| 2/5/28 |
|
Holley Carburetor |
3 : 4 (aet) |
Sparta A & BA |
|
|
|
|
|
| Quarterfinals |
| 2/26/28 |
|
Brooklyn Wanderers |
0 : 1 |
New York Nationals |
| 2/26/28 |
|
J & P Coats |
2 : 1 |
Fall River Marksmen |
| 2/26/28 |
|
Ben Miller FC |
4 : 3 (aet) |
Magyar American FC |
| 2/26/28 |
|
Bricklayers FC |
1 : 0 |
Sparta A & BA |
|
|
|
|
|
| Semifinals |
| 3/18/18 |
|
New York Nationals |
5 : 3 |
J & P Coats |
| 3/18/28 |
|
Ben Miller FC |
0 : 2 |
Bricklayers FC |
|
|
|
|
|
| Final |
| at Polo Grounds, New York, New York |
| 4/9/28 |
|
New York Nationals |
1 : 1(aet) |
Bricklayers FC |
| at Soldier Field, Chicago, Illinois |
| 4/15/28 |
R |
New York Nationals |
3 : 0 |
Bricklayers FC |
| KEY – w/o – Walkover, R – Replay |
