Draft:2023 Senior A box lacrosse season

Semi-finals
Six Nations won 4 games to 1.

Peterborough won 4 games to 0.

Final
Peterborough won 4 games to 0.

Semi-finals
New Westminster won 3 games to 0. Langley won 3 games to 1.

Final
New Westminster won 4 games to 3.

Mann Cup
The 2023 Mann Cup championship series was the third meeting between the New Westminster Salmonbellies and the Six Nations Chiefs, with the Chiefs having won both previous encounters in 1994 and 1995. The Chiefs won the series in five games to earn their 7th Mann Cup title, while New Westminster's title drought was increased to thirty seasons since their last win in 1991.

Six Nations won 4 games to 1.