Background: Michael Kevin Taylor (born 17 January 1949) is an English musician, best known as a former member of John Mayall's Bluesbreakers (1966-69) and the Rolling Stones (1969-74). He has appeared on some of the Stones' classic albums including Let It Bleed, Sticky Fingers and Exile on Main St..
Context: Taylor was born to a working-class family in Welwyn Garden City, but was raised in Hatfield, Hertfordshire, England, where his father worked as a fitter (machinist) for the De Havilland aircraft company. He began playing guitar at age nine, learning to play from his mother's younger brother. As a teenager, he formed bands with schoolmates and started performing concerts under names such as The Juniors and the Strangers. They also appeared on television and put out a single. Part of the band was recruited for a new group called The Gods, which included Ken Hensley (later of Uriah Heep fame). In 1966, The Gods opened for Cream at the Starlite Ballroom in Wembley.  In 1965, at age 16, Taylor went to see a John Mayall's Bluesbreakers performance at "The Hop" Woodhall Community Centre, Welwyn Garden City.  On the night in question, I had gone to The Hop with some guys from our band, former schoolmates and Ex-Juniors Mick Taylor and Alan Shacklock. It was after John Mayall had finished his first set without a guitarist that it became clear that for some reason Eric Clapton was not going to show up. A group of local musicians, which included myself, Robert 'Jab' Als, Herbie Sparks, and others, along with three local guitarists--Alan Shacklock, Mick Casey (formerly of the Trekkas) and Mick Taylor--were in attendance.  Taylor himself has said after seeing that Clapton hadn't appeared, but that his guitar had already been set up on the stage, he approached John Mayall during the interval to ask if he could play with them. Taylor mentioned that he'd heard their albums and knew some of the songs, and after a moment of deliberation, Mayall agreed. Taylor amended, "I wasn't thinking that this was a great opportunity... I just really wanted to get up on stage and play the guitar."  Taylor played the second set with Mayall's band, and after winning Mayall's respect, they exchanged phone numbers. This encounter proved to be pivotal in Taylor's career when Mayall began to look for a guitarist to fill Peter Green's vacancy the following year. Mayall contacted Taylor, and invited him to take Green's place. Taylor made his debut with the Bluesbreakers at the Manor House, an old blues club in north London. For those in the music scene the night was an event... "Let's go and see this 17-year-old kid try and replace Eric". Taylor toured and recorded the album Crusade with John Mayall's Bluesbreakers. From 1966 to 1969, Taylor developed a guitar style that is blues-based with Latin and jazz influences. He is the guitarist on the Bluesbreaker albums Diary of a Band, Bare Wires, and Blues from Laurel Canyon. Later on in his career, he further developed his skills as a slide guitarist.
Question: When did he begin playing music?

Answer:
He began playing guitar at age nine,