Stephen Mark Thompson Jr., (born March 23, 1997) nicknamed "Stevie",[1] is an American–Puerto Rican professional basketball player for the Wisconsin Herd of the NBA G League.

[2] He was named CIF Southern Section Division IV High School Player of the Year by the John R. Wooden Award Committee.

[2] He played college basketball for the Oregon State Beavers, and declared for the 2017 NBA draft.

[2] Finished his Oregon State career fourth all-time in scoring (1,767), first in 3-pointers made (230), and tied for eighth in steals (177).

[2] On October 28, 2019, Thompson was named to the training camp roster of the Wisconsin Herd of the NBA G League.

[6] On July 16, 2021, Thompson signed in the highest Italian competition, in the Serie A and the Fiba Europe Cup for Reggio Emilia a two years contract with exit option in 2022.

[11] On March 22, 2024, Thompson re-signed with the Vaqueros de Bayamón, returning in April, after the G League season concluded.