Thomas competing for the Detroit Pistons against the New York Knicks at Madison Square Garden in New York in 1985
On March 12, 1984, the Detroit Pistons signed NBA all-star guard Isiah Thomas to an 11-year contract worth an estimated $12 million, the highest compensation and longest contract ever extended by the club.
Sources:
Mich-Again’s Day
Zlati Meyer, “Isiah Thomas scored record Pistons contract”, Detroit Free Press, March 8, 2015.