Born June 6, 1927 Cal Christensen played in the NBA mainly as a Forward/Centre during their playing career, season(s): 1951-1955. Calvin Lawrence Christensen was an American basketball player. He played collegiately for the University of Toledo. He was selected by the Tri-Cities Blackhawks in the 5th round of the 1950 NBA draft. He played for the Blackhawks, Milwaukee Hawks and Rochester Royals in the NBA for 291 games.