He played college basketball for the UCLA Bruins under Coach John Wooden, winning three straight national championships from 1967 through 1969.

"[7] Led by the dominant play of Lew Alcindor (known later as Kareem Abdul-Jabbar),[6] the Bruins went 88–2 in Sweek's three seasons on the varsity squad.

[8] Sweek is one of 14 players who won three National Collegiate Athletic Association (NCAA) titles at UCLA under Wooden.

[11] In 1966–67, he was joined on the varsity team by incoming sophomores Alcindor, Lucius Allen, Lynn Shackelford and Kenny Heitz, who were recruited in 1965.

[14] Against USC in February 1967, Sweek helped stave off an upset in overtime after scoring two baskets, making two steals, and forcing another turnover in a 40–35 victory over their intercity rivals.

[20] The team had lost starting guards Allen and Mike Warren from the year before, but they were effectively replaced by Sweek, Heitz, and junior college transfer John Vallely, who each played about equally.

[23][24] Sweek shot a perfect three of three in the game, which the Bruins won by 20 points for their record-setting third consecutive NCAA title.

[37] Some of his clients included the 7-foot-7-inch (2.31 m) Gheorghe Mureșan, the tallest player in NBA history,[38] Martin Müürsepp,[37] John Amaechi,[39] Terry Davis,[40] and Damon Bailey.

[36][42] While still at ProServ in 1996, he began coaching basketball at George Mason High School in Falls Church, Virginia.