Houston Rockets player P.J. Tucker ain't happy with the NBA's 1-year ban against Golden State Warriors part-owner Mark Stevens ... telling TMZ Sports, "It should be more!"
As we previously reported ... in addition to the 1-year ban, Stevens was also fined $500,000 for pushing Toronto Raptors star Kyle Lowry during Game 3 of the NBA Finals after Lowry dove into the crowd trying to save a loose ball.
Lowry says Stevens also cussed at him several times during the interaction.
Tucker says the NBA's punishment feels very light -- and says everyone should be outraged by Stevens' conduct.