William Christopher Bruin (born October 24, 1989) is an American former professional soccer player who played as a forward.

Bruin also made two appearances for the United States national team in 2013, and was a part of the squad that won that year's CONCACAF Gold Cup.

Bruin was named the 2007 Missouri State Soccer Player of the Year and was a two time NSCAA All-American while at De Smet Jesuit.

Bruin chose to forgo his final season of collegiate eligibility, instead declaring for the MLS SuperDraft and signing a Generation Adidas contract with Major League Soccer.

[5] On July 30, he suffered a knee injury during a 3–1 win over the Seattle Sounders FC, causing him to miss over 5 weeks.

[6] He ended the regular season with 25 appearances, 5 goals, and 1 assist, helping the Dynamo finish 2nd in the Eastern Conference and qualify for the playoffs.

[8] Bruin ended the MLS regular season with 12 goals and 4 assists from 32 appearances to help Houston qualify for the playoffs.

He had a goal and an assist in Houston's next game, a 2–0 win over Sporting Kansas City in leg 1 of the Eastern Conference semifinals.

Bruin played the full 90 minutes in MLS Cup as Houston lost to the Galaxy for the second straight season, this time by a score of 3–1.

He would start Houston's next 3 playoff games as well, but came off injured in the first leg of the Conference Finals, a 0–0 draw against Sporting Kansas City.

[21] On December 23, 2016, Bruin was traded to the Seattle Sounders in exchange for undisclosed amounts of general and targeted allocation money.

[25] Bruin and the Sounders opened the 2018 season on February 22 with a 2–1 loss to Santa Tecla in the leg 1 of the CONCACAF Champions League round of 16.

[10] On April 15, he picked up his first goal and assist of the MLS season to give Seattle a 2–2 draw with Sporting Kansas City.

On April 1, Bruin played a game for Seattle's USL Championship affiliate, the Tacoma Defiance, scoring once and adding an assist in a 2–1 win over Sacramento Republic.

Bruin made his first appearance since tearing his ACL on July 27, coming off the bench and scoring in a 4–1 loss to LAFC in the round of 16 of the MLS is Back Tournament.

On February 10, 2023, Austin FC announced that they had signed Bruin to a one-year contract with an option for a second year after a successful trial with the team in their pre-season camp.

[33] Bruin made his first appearance for the team in their first CONCACAF Champions League match on March 7, coming on in the 70th minute of a 3–0 loss to Violette AC.

[34] On March 25, Bruin made his first league appearance for the team in a 1–1 draw against the Colorado Rapids, coming on in the 86th minute.

[38] Bruin made his debut for the United States men's national soccer team on January 29, 2013, coming on as a substitute in a 0–0 draw against Canada.

[39] On June 27, 2013, U.S. head coach Jürgen Klinsmann named Bruin to the 23-man squad for the 2013 CONCACAF Gold Cup.