He played in Major League Soccer for the Chicago Fire and Houston Dynamo as a forward and winger.

[1] Carr played college soccer at the University of California, Berkeley, where he finished with 22 goals and 15 assists in 75 matches.

[4] He also played with Orange County Blue Star in the USL Premier Development League for two seasons, and in the summer of 2005, trained with Arsenal in England.

He made his Fire debut in the opening match of April 1, 2006, coming on as substitute in a 3–2 loss to FC Dallas.

The next match saw him Carr get his first career start, as he helped the Fire to a 2–1 win over Real Salt Lake.

Carr finished the regular season with 27 appearances, 10 of them starts, 3 goals and 2 assists, helping the Fire qualify for the playoffs.

He found the back of the net in Chicago's next match to help the Fire to a 2–2 draw with the Columbus Crew.

In Houston's opening game of the playoffs, Carr scored to help the Dynamo to a 2–1 win over the Philadelphia Union.

[22] Houston opened the 2012 season on March 11 with a 1–0 win over Chivas USA, with Carr coming off the bench in the game.

[23] On June 16, he suffered a left hamstring strain during a 2–1 win over FC Dallas, forcing him to miss 5 games.

Carr found the back of the net again in Houston's next game, a 2–0 win over the New York Red Bulls.

[23] On September 20, Carr played in his first career CONCACAF Champions League match, scoring once in a 4–0 win against C.D.

[4] Since 2016, Carr has worked as a host for various shows on MLS's website and YouTube channel, including "The Movement" documentary series and the "Extratime" podcast.

[2][4] His mom is white from Indianapolis, Indiana while his dad is Aboriginal Australian from Alice Springs, Northern Territory.