Sean Patrick O'Neill (born July 31, 1967) is an American table tennis player, coach, and commentator.

He represented the United States in five World Championships, four Pan American Games—earning two gold, five silver, and one bronze medals—and participated in the 1988 and 1992 Olympic Games.

Notably, he lit the torch alongside Sharon Cain of Team Handball during the 1993 Opening Ceremonies in San Antonio.

During his junior years, he played for the Ängby Sport Club in Stockholm, Sweden, and trained in China on several occasions.

O'Neill has contributed to NBC's Olympic coverage since 2004, providing color commentary for table tennis events in Athens (2004), Beijing (2008), London (2012), Rio de Janeiro (2016), Tokyo (2021), and Paris (2024).