"THIS SPORT IS MY LIFE, IT'S WHAT I HAVE DONE EVER SINCE I COULD WALK.
I WAS FORTUNATE ENOUGH TO ACHIEVE MY DREAMS, I NOW LOVE WORKING WITH KIDS EVERYDAY TO HELP THEM TRY AND ACHIEVE THEIRS"
In 2000, Forrester joined Watford from Northampton Town. As Forrester was only 9 years old, Watford paid Northampton £13,000 in compensation. After 7 years in the Watford FC academy, In summer of 2007, Aston Villa signed Forrester from Watford, despite reported interest from the likes of Tottenham Hotspur and Manchester United for the highly-rated teen. Forrester was only 16-years-old at the time he signed for Villa. An initial fee of £250,000 was set which could have potentially risen to £1.2 million as well as a percentage of the sell-on fee. After joining, he immediately helped Villa's under-18 team to FA Premier Academy League glory in the 2007–08 season. He also started for Villa's reserve team who in the 2009–10 season, won the Reserve League South title for a third consecutive time.
Forrester made his debut for Rangers on 10 January 2016 in a 5–1 win over Cowdenbeath in the Scottish Cup. On 27 February, Forrester scored his first goal for the club, netting the winner with four minutes remaining in a 1–0 league victory over St Mirren after coming on as a substitute. On 10 April while playing in the 2016 Scottish Challenge Cup Final against Peterhead, Forrester was substituted because of injury and limped off the park, it was revealed later he had suffered a hairline fracture which ultimately ended his season. However, two days later, on 12 April, he signed a new three-year contract with Rangers.
On 18 January 2019, it was announced that Forrester was signed by USL Championship side Orange County SC ahead of the 2019 season.
With 2020 and all its challenges proving to not slow Forrester down, he alongside Robbie Kiernan Launched Prospect Soccer Academy globally in September 2020. Prospect Soccer Academy is an elite, independent coaching academy where the two internationally renowned players will teach and develop the skills and technique of the sports next generation.