Born in Franklin, Indiana, McGlocklin spent over a decade in the National Basketball Association (NBA) after being drafted by the Cincinnati Royals in 1965.

A sharpshooting 6'5" guard from Indiana University, McGlockin was selected by the Cincinnati Royals in the third round of the 1965 NBA draft.

He only stayed one season in San Diego before being left unprotected in the 1968 expansion draft, in which he was taken by the Milwaukee Bucks.

McGlocklin stayed in Milwaukee for eight years, helping lead the Bucks to the NBA Championship (as a teammate of Kareem Abdul-Jabbar and Oscar Robertson) in 1971.

He immediately joined the Bucks' television broadcast team as color commentator, a post he has held for 45 years.