It's Earl Lloyd. Lloyd was one of three black players to enter the NBA at the same time. It was because of the order in which the team's season openers fell that Lloyd was the first to actually play in a game in the NBA, scoring six points on Halloween night for the Washington Capitols.
The date was October 31, 1950, one day ahead of Chuck Cooper of the Boston Celtics and four days before Nat "Sweetwater" Clifton of the New York Knicks.
(Below) is his 1957 Topps card.