1999 Eastern League season

The 1999 Eastern League season began on approximately April 1 and the regular season ended on approximately September 1.

The Harrisburg Senators defeated the Norwich Navigators 3 games to 2 to win the Eastern League Championship Series.

Standings
Notes:
 * Green shade indicates that team advanced to the playoffs.
 * Bold indicates that team advanced to ELCS.
 * Italics indicates that team won ELCS.

Northern Division
The Norwich Navigators defeated the Trenton Thunder in the Northern Division playoffs 3 games to 2.

Southern Division
The Harrisburg Senators defeated the Erie SeaWolves in the Southern Division playoffs 3 games to 1.

Championship Series
The Harrisburg Senators defeated the Norwich Navigators in the ELCS 3 games to 2. In the final game of the series, the Navigators were leading 11-9 in the bottom of the ninth. The bases were loaded, there was 2 outs and a full count. That's when Milton Bradley hit a grand slam to win the game, and league championship, for the Senators.