O'Brien (born April 8, 1992) is an American professional basketball player for Tofaş of Basketbol Süper Ligi (BSL).

On his sophomore season, he played in all 34 games, starting 33 averaging 7.2 points on 52.6 percent shooting, 4.5 rebounds and 1.5 assists.

[3] He also played with Utah at the Las Vegas Summer League, owning averages of 4.6 points, 1.8 rebounds and 1.2 assists in 18.8 minutes.

[4] On November 1, 2015, he was acquired by the Idaho Stampede of the NBA Development League as an affiliate player of the Jazz.

[5] On November 13, he made his professional debut in a 110–106 loss to the Rio Grande Valley Vipers, recording 12 points, three rebounds, two steals and two blocks in 42 minutes.

[7] Later that night, he made his NBA debut against the Los Angeles Lakers, recording one rebound and one steal in four minutes of action.

[11] On August 23, 2017, O'Brien was selected by the Agua Caliente Clippers in the NBA G League expansion draft.