Marquette Basketball Legend George Thompson Dead At 74

George Thompson, one of the greatest players in the history of Marquette basketball, has died at 74 years old, the school announced on Wednesday night.

The university shared the sad news in a tweet ... saying Thompson passed away due to complications from diabetes.

"George made a tremendous impact, not only on the program, but the entire Milwaukee community after his arrival on campus," school officials said. "RIP Brute Force."

The Brooklyn native was a standout at Marquette from 1966 to 1969, playing under legendary coach Al McGuire. In 87 career games at the school, spanning three seasons, he averaged 20.4 points, 7.9 rebounds and 1.5 assists.

He went on to be selected by the Boston Celtics in the 5th round of the 1969 NBA Draft ... but chose to start his pro career with the Pittsburgh Pipers of the American Basketball Association.

George spent 5 total seasons in the ABA -- playing for the Condors/Memphis Tams for 2 years -- before taking his talents to the NBA to play for the Milwaukee Bucks.

The 3-time ABA All-Star only played one season with the Bucks, but his iconic #24 jersey hangs in the rafters at Fiserv Forum thanks to his storied career at Marquette.

Thompson -- a member of Marquette's Hall of Fame -- was inducted into the Wisconsin Athletic Hall of Fame in 2001.