Horley Town striker Ashley Nadesan scored in a trial game for Millwall on Monday.
Nadesan, who plays for Horley Town in the ninth tier, scored in Millwall Under-21s' 4-2 win against Barnsley on Monday and travelled with the side beaten 3-0 by Birmingham City last week.
However, Lions boss Neil Harris, a former non-league striker himself, stressed: "We are giving him the opportunity to be around a professional environment and see how he gets on. That is all.”
Nadesan's agent Darren Lewis said his client was being watched by a whole queue of clubs, and will link up with Premier League strugglers Norwich next week.
"There is a whole queue of clubs looking at him - he is at Norwich next week; there is interest from Cambridge plus an open invitation from Crawley; and Brighton are watching him closely," Lewis told South London Today.
The newspaper reports that Nadesan, who's scored 92 goals in two seasons for Horley, earns £200 a week as a McDonalds supervisor, plus £30 per competitive appearance for the Surrey side.
The 21-year-old is said to have turned down six offers from higher division clubs in order to fire Horley to promotion.
Lewis added: "He has movement, speed and technique and is 6ft 2in tall.
"But he is not just a striker - he has also had to play for Horley in midfield, out wide and as a centre-back in some games.
"The reason people have compared him to Jamie Vardy is because he is very hard to track. Defenders can’t keep tabs on him.
"I would rather tie something up in the next 10 weeks than leaving him to the lottery of pre-season, when lots of players will be on trial. It is my job to have him secure at a club before then."
Crawley, Millwall and Brighton are all situated within an hour's drive of Nadesan's native Redhill, Surrey.