NBA's Patrick Beverley Throws Ball at Heckling Mavs Fan Who Dissed His Mom

[[tmz:video id="0_oq7bumf1"]] L.A. Clippers player Patrick Beverley fired a basketball at a courtside heckler Sunday night after the fan allegedly said, "F*ck your mother" ... the 2nd major incident between a player and a Mavs fan in 2 weeks. The…