2003
- April 15 – During a game between the Chicago White Sox and the Kansas City Royals in Chicago, a fan ran on to the field (mid-play) and tried to tackle umpire Laz Diaz; Diaz, who was a former United States Marine, easily threw the fan to the ground.
- April 19 – Texas Rangers right fielder Carl Everett was hit in the back of a head by a cell phone at Oakland's Network Associates Coliseum. The male fan who threw the phone was arrested.
- April 26 – During a League One match between Queens Park Rangers F.C. and Crewe at Loftus Road, a beer can was thrown at the referee, Andy Hall; at the end of the match, which ended in a 0-0 draw that ensured Crewe's promotion and saw two QPR players ejected, a pitch invasion occurred, with a QPR fan running onto the pitch to remonstrate with and abuse Hall before being ejected from the arena. Queen's Park Rangers were fined ₤50,000 by the English FA for having inadequate security.
- July 9 – During the Milwaukee Brewers' Sausage Race, Pittsburgh's Randall Simon leaned over the dugout and hit one of the racers, Mandy Block, with a bat. Block suffered a very minor injury, and Simon was later arrested and fined. Block forgave Simon, who said he did it "all in clean fun".
- October 11 – A grounds crew member at Fenway Park, Paul Williams, got into a fight with New York Yankees relief pitcher Jeff Nelson, which resulted in Nelson and Yankees right fielder Karim Garcia jumping Williams. Nelson and Garcia were ejected, and all three were charged with assault and battery.
- October 11 – At the end of a college football game between the Nebraska Cornhuskers and the Missouri Tigers in Columbia, Missouri, celebrating Missouri fans invaded the field, and Nebraska cornerback Kellen Huston punched a Missouri fan, Matthew Scott, in the face, knocking Scott unconscious and leaving him having to be carried from the field on a stretcher; Scott also required surgery for a broken nose. Huston was suspended for one game and fined $500 in court after pleading guilty to a Class B misdemeanor charge of public disturbance of fighting.
- November 1 – In the late stages of a pool match in the 2003 Rugby World Cup between South Africa and Samoa at Suncorp Stadium in Brisbane, a drunk Samoan fan ran onto the pitch and attempted to tackle Springbok Louis Koen around the legs as he was kicking a goal. Koen kicked the goal, and inadvertently knocked the fan unconscious with a kick to the head.
Read more about this topic: List Of Violent Spectator Incidents In Sports