John Warren Jr. (born January 7, 1947) is a retired American professional basketball player.

Born in Sparta, Georgia, Warren attended Far Rockaway High School in Queens, New York,[2] and played college basketball at St. John's University from 1966 to 1969.

[3] After his collegiate career, Warren played five seasons (1969–1974) in the National Basketball Association as a member of the New York Knicks and Cleveland Cavaliers.

He currently holds the record for most field goals made without a miss in Cleveland Cavaliers history (12 for 12).

[4] While playing for the Cavaliers on December 9, 1970, Warren mistakenly scored for the Portland Trail Blazers on a fast break lay-up at the beginning of the fourth quarter.