Phineas Gladney John (1910–1985) was a Welsh professional boxer who fought from 1927 and 1940. John ended his career as a featherweight, but in his early professional bouts, he fought as a flyweight before increasing to bantamweight. Soon after he turned professional John competed for area titles, taking the Welsh flyweight belt in 1928 and then the Welsh bantamweight in 1929. After 1929 John failed to pursue any further titles, but continued fighting across the United Kingdom, ending his career with at least 242 professional fights.