The 2003 National Lacrosse League season began on December 27, 2002 and concluded with the championship game on May 3, 2003.
In 2003, the NLL became the first major men's sports league in North America to feature a woman playing in a regular-season game. Ginny Capicchioni, a stand-out goaltender at Sacred Heart University, was signed by the New Jersey Storm as their third-string goaltender. She dressed for three games, though only played in one. Capicchioni collected one loose ball and made six saves while allowing 7 goals in 11 minutes of play.
2003 saw the Montreal Express suspend operations, and also saw the Washington Power move to Colorado, where even they were unprepared for the warm welcome they received in Denver. The franchise had drawn small crowds in Washington as well as in Pittsburgh and Baltimore before that, but averaged more than 16,000 fans per game in 2003, second in the league only to Toronto.
x–Clinched playoff berth;c–Clinched playoff berth by crossing over to another division;y–Clinched division;z–Clinched best regular season record;GP–Games Played W–Wins;L–LossesGB–Games back;PCT–Win percentage;Home–Record at Home;Road–Record on the Road;GF–Goals scored;GA–Goals allowed Differential–Difference between goals scored and allowed;GF/GP–Average number of goals scored per game;GA/GP–Average number of goals allowed per game