Review of the Season
After sitting out the 1972 season, Syracuse Suns returned to play in the 1973 season.
The Wildcats captured second place in the Northeast Conference.
New York Apollo qualified for 1973 A. S. L. Playoffs as the winners of the Northeast Conference.
Baltimore Bays qualified for 1973 A. S. L. Playoffs as winners of the Mid-Atlantic Conference.
Defending ASL champions Cincinnati Comets were aligned to the Midwest Conference along with returning clubs Cleveland Stars and Detroit Mustangs. They were joined by new members Indiana (Gary) Tigers.
Cincinnati Comets and Cleveland Stars qualified for 1973 A. S. L. Playoffs. The Comets qualified as the winners of the Midwest Conference. The Cleveland Stars qualified for the playoffs via a wildcard.
New York Apollo won the 1973 ASL Championship by defeating Cincinnati Comets 1-0 after overtime in the playoff final.
Final standings
Northeast Conference
| GP | W | L | T | GF | GA | Pts | |
| New York Apollo | 14 | 11 | 3 | 0 | 46 | 15 | 20 |
| Connecticut Wildcats | 14 | 8 | 3 | 3 | 28 | 21 | 19 |
| Boston Astros | 14 | 8 | 5 | 1 | 26 | 20 | 15 |
| Syracuse Suns | 14 | 1 | 13 | 0 | 18 | 55 | 2 |
New York Apollo qualified for 1973 A. S. L. Playoffs
Mid-Atlantic Conference
| GP | W | L | T | GF | GA | Pts | |
| Baltimore Bays | 14 | 7 | 5 | 2 | 31 | 25 | 16 |
| New Jersey Brewers | 14 | 5 | 4 | 5 | 31 | 23 | 15 |
| Delaware Wings | 14 | 5 | 7 | 2 | 22 | 25 | 12 |
| Philadelphia Spartans | 14 | 4 | 7 | 3 | 22 | 29 | 11 |
Baltimore Bays qualified for 1973 A. S. L. Playoffs
Midwest Conference
| GP | W | L | T | GF | GA | Pts | |
| Cincinnati Comets | 12 | 10 | 2 | 0 | 46 | 15 | 20 |
| Cleveland Stars | 12 | 8 | 2 | 2 | 56 | 22 | 18 |
| Gary Tigers | 12 | 3 | 7 | 2 | 24 | 48 | 8 |
| Detroit Mustangs | 12 | 0 | 10 | 2 | 16 | 57 | 2 |
Cincinnati Comets and Cleveland Stars qualified for 1973 A. S. L. Playoffs
Leading goal scorers
| Players | Games | G | A | PTS |
| 1. Eddy Roberts (Cincinnati Comets) | 12 | 12 | 10 | 34 |
| 2. Doug McMillan (Cleveland Stars) | 7 | 11 | 7 | 29 |
| 3. Steve Devic (Cleveland Stars) | 10 | 9 | 8 | 26 |
Leading goalkeepers
| Goalkeepers | Min. | Gls | Svs | GAA |
| 1. Antonio Cruz (Cincinnati Comets) | 580 | 4 | 33 | 0.61 |
| 2. Gustavo Carias (Boston Astros) | 990 | 14 | 31 | .093 |
| 3. Mickey Cohen (Connecticut Wildcats) | 810 | 10 | 59 | 1.11 |
1973 ASL Playoffs
Semi-finals
September 3, 1973 Metropolitan Oval, New York
Attendance:
Referee:
New York Apollo 2 (Nick Tonerozos, Tony Froncillo)
Baltimore Bays 0
New York Apollo qualified for ASL Championship final
September, 1973
Attendance:
Referee:
Cincinnati Comets 4
Cleveland Stars 1
Cincinnati Comets qualified for ASL Championship final
1973 ASL Championship
Saturday September 8, 1973 Metropolitan Oval, New York
Attendance: 5,000
Referee:
New York Apollo 1 (Tony Froncillo)
Cincinnati Comets 0
New York Apollo defeated Cincinnati Comets 1-0 after overtime