That became motivation for me.Wong played for an all-Chinese American basketball team sponsored by the H. K. and Frank Sports Shop (aka the Chinese All-Stars) in 1946 and 1947.

The Santa Cruz Sentinel-News reported the "Chinese scat cagers" were "[t]errific crowd pleasers" and "made swell passes and plenty of nice baskets" but "couldn't beat the backboard control of the Sportsmen".

[7] In the second, which was held three weeks later on March 29 at the Santa Cruz Civic Auditorium to benefit the local Red Cross, the Chinese All-Stars prevailed, 50–41.

[15] At USF, he played off the bench for the 1949–50 varsity squad and attracted national attention, with Jim O'Leary calling him "one of the wonders of the athletic world"; Newell praised Wong's shooting touch, as the guard was making more than 60 percent of his field goals.

Wong also played for the Oakland Atlas-Pacific Engineers of the National Industrial Basketball League during that team's final season (1951–52).

[2] To honor Wong's athletic achievements, local Chinatown residents successfully petitioned the City and County of San Francisco to rename the "Chinese Playground", where he played as a child and developed his basketball skills, to "Willie "Woo Woo" Wong Playground".

[18][19][20] It was closed for more than two years while undergoing a $14.5 million renovation, and reopened in February 2021 with "dragon and phoenix" play structures.