Barker started his boxing career at a young age, he trained at Finchley and District Amateur Boxing club in New Barnet where he was trained by Jimmy Oliver (father of former European Champion Spencer Oliver) amongst others.
Oliver Cromwell | Spencer Tracy | Oliver Stone | Oliver! | Oliver Goldsmith | Oliver | Jamie Oliver | Oliver Wendell Holmes, Jr. | Oliver Sacks | Oliver Wendell Holmes, Sr. | Marks & Spencer | Oliver Twist | Spencer | Oliver Wendell Holmes | Oliver Hardy | Oliver Reed | Oliver North | Oliver Nelson | Oliver Hazard Perry | Oliver Lake | Oliver Heaviside | Herbert Spencer | Oliver O. Howard | Wedding of Charles, Prince of Wales, and Lady Diana Spencer | Spencer Gulf | Oliver Tambo | Jimmy Spencer | Spencer W. Kimball | Spencer Wells | Oliver Lodge |