Lewington played four seasons with the Medicine Hat Tigers of the Western Hockey League prior to joining the Capitals' organization. Leading up to the 2013 NHL Entry Draft, Lewington was ranked 66th overall for North American skaters by the NHL Central Scouting Bureau. While playing with the Tigers, he was drafted 204th overall by the Washington Capitals in the 2013 NHL Entry Draft. Lewington was named captain of the Tigers for the 2014–15 season and was awarded the team's leadership award. On March 4, 2015, Lewington signed a three-year, entry-level contract with Washington. Although Lewington had the opportunity to join the Capitals American Hockey League affiliate, the Hershey Bears after the Tigers were eliminated from the WHL playoffs, Lewington needed surgery to repair a shoulder injury. Although Lewington was healed by the time the Capitals 2015 training camp came around, he was assigned to the Hershey Bears to begin the season. Lewington made the Bearsopening night roster but before he had a chance to play a game, he was reassigned to their ECHL team on October 15. Lewington spent the season splitting his time playing with the Hershey Bears and the South Carolina Stingrays of the ECHL. The following two seasons Lewington was a steady presence in the AHL, playing in 201 games before making his NHL debut. Lewington played in 71 games for the Bears during the 2017–18 season. While he played in 71 games, Lewington was suspended twice in March, and once in April. Lewington was re-signed by the Capitals on May 18, 2018 to a two-year, two-way contract. Lewington attended the Capitals training camp prior to the 2018–19 season. On September 26 he was placed on waivers with the intention of reassigned him to Hershey. After playing in 26 games, Lewington was recalled to the NHL on December 15. On December 22, 2018, he made his NHL debut against the Ottawa Senators. A week later in another game against the Senators, Lewington completed a Gordie Howe hat trick, recording his first NHL goal, assist, and fight in the process. In the same game, fellow rookie defenseman Madison Bowey also scored his first NHL goal, making the two players the first defensemen in Capitals history to score their first NHL goals in the same game. The following day Lewington was returned to Hershey.
Personal life
Lewington was born to Linda and Marshall and grew up in Edmonton with his sister Amanda.
