[2] As a four-year player at Utah, Washburn appeared in 123 games with 70 starts and averaged 8.7 points, 5.0 rebounds and 1.3 blocks in 22.4 minutes per game,[3] finishing as the Utes' leading scorer (11.4 ppg), rebounder (6.2 rpg) and shot blocker (1.4 bpg) as a junior in 2011–12.

[2] On June 12, 2013, Washburn signed with Cherkaski Mavpy of the Ukrainian Basketball SuperLeague for the 2013–14 season.

[5] Four days later, he signed a one-month deal with Tsmoki-Minsk of the Belarusian Premier League.

[10] In August 2016 Washburn signed with the Yokohama B-Corsairs for the inaugural season of the Japanese B.League.

[14] On August 1, 2024, Washburn signed with the New Taipei Kings of the Taiwan Professional Basketball League (TPBL).