The 2020 Yawkey League season has come down to one final game as the best of five championship series is now tied at two game each.
East Boston took a commanding 2-0 lead in the series with a 4-2 win in Game 1 and a 6-0 win in Game 2.
Charlestown would stay alive winning Game 3 by a score of 11-0.
Charlestown forced the deciding Game 5 with a 6-5 walk off win after East Boston had tied the game in the top of the 7th.
Game 5 will take place at Alumni Field in Lowell with a a first pitch scheduled for 8:00pm.