The man utd kid who went from cl to building site in five years

I think you might be referring to Mason Greenwood, a young English footballer who played for Manchester United's youth team and academy. Greenwood was born in 2001 and joined Manchester United's youth academy at the age of 6. He quickly rose through the ranks, making his professional debut for the club in 2019 at the age of 17.

However, I'm not aware of any information that suggests Greenwood went from playing for Chelsea (CL) to working on a building site in just five years. It's possible that you may be thinking of a different individual or mixing up facts.

Mason Greenwood has continued to play for Manchester United's first team and has also represented England at various youth levels. He has been praised for his pace, skill, and goal-scoring ability, and is considered one of the most promising young players in the world.

If you could provide more context or clarify what you mean by "CL" and "building site", I may be able to help you better.