The 1983 Eastern League season began on approximately April 1 and the regular season ended on approximately September 1.
The New Britain Red Sox defeated the Lynn Sailors three games to one to win the Eastern League Championship Series.
| Eastern League[1] | ||||
|---|---|---|---|---|
| Team | Win | Loss | % | GB |
| Reading Phillies | 96 | 44 | .686 | – |
| Lynn Pirates | 77 | 62 | .554 | 18.5 |
| Buffalo Bisons | 74 | 65 | .532 | 21.5 |
| New Britain Red Sox | 72 | 67 | .518 | 23.5 |
| Albany/Colonie A's | 63 | 73 | .463 | 31.0 |
| Nashua Angels | 60 | 80 | .429 | 36.0 |
| Waterbury Reds | 59 | 80 | .424 | 36.5 |
| Glens Falls White Sox | 53 | 83 | .390 | 41.0 |
Notes:
Lynn Sailors defeated Buffalo Bisons 2 games to 0.
New Britain Red Sox defeated Reading Phillies 2 games to 1.
New Britain Red Sox defeated Lynn Sailors 3 games to 1.
| 1983 Eastern League | Regular season | Playoffs |
|---|---|---|
| Total attendance | 909,015 | 16,581 |
| Total games played | 554 | 9 |
| Average attendance per game | 1,641 | 1,842 |