Jon P. McGlocklin (born June 10, 1943) is an American former professional basketball player born in Franklin, Indiana.
A sharpshooting 6'5" guard from Indiana University, McGlockin was selected by the Cincinnati Royals in the third round of the 1965 NBA draft, but he is best known for his 8-season (1968–1976) tenure with the Milwaukee Bucks, with whom he won an NBA Championship (as a teammate of Kareem Abdul-Jabbar and Oscar Robertson) in 1971. He scored 9,169 points in his NBA career, and his #14 jersey has been retired by the Bucks franchise. He also appeared in the 1969 NBA All-Star Game
McGlocklin was best known for his high-arcing "rainbow" jump shot from the wings, in what would now be three-point territory. It was most effective when paired in a two-man play with Jabbar: if the opposing guard fell back to double-team Jabbar, McGlocklin would make them pay from the perimeter; when the guard came out to defend him, he would pass the ball down to Jabbar with only one defender, who under most circumstances was out-matched.
McGlocklin was selected as one of the "Top 50 Basketball Players" of the 20th Century, in his home state of Indiana, as well as being inducted into the Indiana Basketball Hall of Fame, Wisconsin Basketball Coaches Association and the Wisconsin Athletic Hall of Fame.
For the last 25 years, McGlocklin has been a member of the Bucks' television broadcasting team, alongside Jim Paschke.
On the night of his retirement in 1976, Jon founded the MACC Fund, which has become nationally recognized in its fight against childhood cancer and has raised over $45 million toward childhood cancer research.