[4] After going undrafted in the 2010 NBA draft, Fortson signed with Steaua Turabo Bucuresti of Romania but later left in January 2011.

[16] On February 18, 2015, Fortson scored a triple double in a EuroChallenge-game against Güssing Knights; he recorded 30 points, 12 rebounds and 13 assists and was named Weekly MVP.

[18] On March 9, 2016, he parted ways with Banvit after averaging 16.2 points, 4.3 rebounds and 6.5 assists per game in BSL.

[20] On January 4, 2017, Fortson recorded a triple-double after posting 22 points, 11 rebounds and a career-high 20 assists in a 117–130 loss to the Shandong Golden Stars.

[22] On July 26, 2021, Fortson signed with Bnei Herzliya of the Israeli Basketball Premier League.

[23] On October 26, 2022, Fortson signed with Spójnia Stargard of the Polish Basketball League (PLK).