The parent of a Little Leaguer who's been barred from participating in a huge game this week is now suing the youth baseball org. on behalf of his son in an effort to overturn the ban.
The minor's suspension stemmed from an incident that occurred on July 16 ... during a Little League Baseball Tournament Section 4 New Jersey Championship game between Haddonfield Little League and Harrison Township.
According to the suit, in the sixth inning, Joseph Rocco's son -- ID'ed as "M.R." -- hit a home run to center field for Haddonfield ... and he celebrated by tossing his bat into the air.