Diana Beverly Matheson (born April 6, 1984) is a Canadian former professional soccer player who played for the Canada national team from 2003 to 2020 and multiple professional women's teams over the course of her career. She is best known for scoring the bronze medal-winning goal for Canada in the 92nd minute against France at the 2012 Summer Olympics. She also won a bronze medal at the 2016 Rio Olympics and gold medal at the 2011 Pan American Games with the senior national team. Matheson was inducted to the Canada Soccer Hall of Fame in 2025.
After retiring in 2021, Matheson co-founded Project 8 with business partner Tom Gilbert and went on to establish the Northern Super League (NSL), Canada's first domestic professional women's soccer league, which began play in 2025.
Born in Mississauga, Ontario, Matheson attended White Oaks Secondary School in Oakville, Ontario, where she received the Principal's Award for athletics and academics. As a member of the Ontario provincial team from 1999 to 2002, she won the national championship in 2001 and was runner-up in 2002, captaining the side in her final year. Playing for the Oakville SC women's team, Matheson was a 2002 Ontario Cup champion and club national women's champion.
Matheson majored in economics at Princeton University in Princeton, New Jersey, and was voted Ivy League Player of the Year in 2007 and Princeton Women's Athlete of the Year in 2008.
As a freshman in 2004, Matheson was a unanimous first-team All-Ivy selection and was named Ivy League Rookie of the Year. She earned first-team All-America and first-team All-Mid-Atlantic Region honours and was one of 12 finalists for SoccerBuzz Freshman of the Year. During her sophomore year, she scored five goals, second-most on the team, and recorded a team-high seven assists. As a junior in 2006, Matheson co-captained the squad and led the Tigers with eight goals and five assists despite missing five games to train with the Canadian national team. As a senior, she missed the first seven games to play in the 2007 FIFA Women's World Cup in China, then broke Princeton's single-game and career assist records with a four-assist performance against Rutgers. She finished as Princeton's third four-time first-team all-league honoree and its seventh Player of the Year.
Matheson began her club career in Canada with the Toronto Inferno in 2003 and the Ottawa Fury from 2004 to 2006. Both clubs were semi-professional, and no fully professional domestic option existed in Canada during her playing career; she would never play professionally in her home country. She was registered with the Inferno while representing Canada at the 2003 FIFA Women's World Cup as a 19-year-old.
Matheson joined the Ottawa Fury of the USL W-League, then the second tier of women's soccer in Canada and the United States, and combined her summers there with her studies at Princeton. The Fury reached the W-League championship final in both 2005 and 2006, losing to the New Jersey Wildcats and the Vancouver Whitecaps respectively, with squads that included more than ten Canadian internationals. Matheson was named to the 2005 W-League Championship All-Tournament team, and the following year was selected as one of four midfielders on the W-League all-league team drawn from the competition's 38 clubs, having recorded a goal and three assists in seven appearances while splitting the summer with national team duty.
Matheson played the second half of the 2008 season in Norway with Team Strømmen, finishing as a runner-up in both the Toppserien and the national cup competition. She rejoined the club for the 2009 season and for the first half of 2010, before national team duties took her away. She finished her time in Oslo with 32 appearances and 11 goals.
In early 2013, Matheson joined the Washington Spirit through the NWSL Player Allocation ahead of the inaugural season of the National Women's Soccer League. Allocated on January 11, 2013, she was one of seven national team players assigned to the club, alongside compatriot Robyn Gayle and Americans Ashlyn Harris, Ali Krieger and Lori Lindsey. She debuted in the Spirit's first match on April 15, 2013, against the Boston Breakers, and scored her first NWSL goal from a late penalty in the club's home opener against the Western New York Flash on April 20. She added a well-taken goal in the 35th minute of a 2–1 home defeat to Sky Blue FC on April 27.
In August 2013 Matheson became the first Spirit player to be named NWSL Player of the Week, recognised for Week 18 after recording a goal and an assist in consecutive 1–0 home wins over the Chicago Red Stars and Seattle Reign. Her assist on Lupita Worbis's 58th-minute winner against Chicago on August 7 delivered the Spirit's first home victory and snapped a seven-match losing run, and three days later she scored the only goal against Seattle in the 83rd minute, beating goalkeeper Hope Solo from the right side of the area. She finished the campaign with eight goals in 19 appearances as the Spirit's leading scorer, a total that ranked joint-fourth in the league, though the club placed last of eight teams. She was named to the NWSL Best XI First Team at the end of the season.
Matheson helped lead the Spirit to their first playoff berth in 2014, contributing eight goals and six assists. Her tally was second on the team behind Jodie Taylor's eleven as Washington finished fourth on 35 points under head coach Mark Parsons. The season ended with a 2–1 loss at the Seattle Reign in the semi-final on August 23, 2014. After joining the team late in 2015 due to injury and World Cup duty, she scored three goals with two assists in nine games. Her absence stemmed from a torn left anterior cruciate ligament sustained in an October 2014 friendly against Japan, compounded by a fractured fifth metatarsal in her right foot in March 2015 that required surgery. The Spirit again placed fourth and again lost a semi-final at Seattle, going down 3–0 on September 13, 2015. She added four goals in 2016, starting nine of the twelve matches she played, and holds the Spirit's all-time records for goals (23) and assists (12). Among them was a 77th-minute header from an Estefanía Banini cross in a 2–1 defeat to Sky Blue FC on June 25. A stoppage-time goal by Francisca Ordega beat the Chicago Red Stars 2–1 in the semi-final, sending the club to its first NWSL final in four years of existence. In the 2016 NWSL Championship against the Western New York Flash, with the match tied 2–2 after extra time, Matheson's penalty in the shootout was saved by Sabrina D'Angelo, securing the title for the Flash. Crystal Dunn scored both Spirit goals before Lynn Williams equalised in the 124th minute, and D'Angelo's stop against Matheson was her third of the shootout after denials of Krieger and Tori Huster in the first penalty shootout in league history.
In January 2017, Matheson was traded to the Seattle Reign in exchange for Arielle Ship and a third-round pick in the 2018 NWSL College Draft.
Matheson tore her ACL while training with the Canadian national team in February 2017 and missed the entire season. She never appeared in a match for Seattle, and was traded to the Utah Royals at the 2018 draft in exchange for Yael Averbuch and a third-round pick.
Matheson appeared in 21 matches and scored twice for Utah in 2018, starting 18 of them. She provided the club's first assist in its history against the Orlando Pride in March, and her first goal for Utah, scored in May against her former club Washington, was voted the league's Goal of the Week. A foot injury sustained with the national team required surgery and cost her the 2019 season. The surgery repaired an avulsion fracture in her left foot, in which a toe ligament had pulled away a fragment of bone that was pressing on a nerve and causing persistent pain.
She returned for the 2020 NWSL Challenge Cup, scoring in the 35th minute of Utah's opening match against the Houston Dash on June 30, 2020, from an Amy Rodriguez cross. It was her first NWSL goal since June 2018, and the match finished 3–3 after Utah recovered from a two-goal deficit. Utah were eliminated by Houston on penalties in the quarterfinals.