The 21-year-old, who only stands at only five foot, five inches tall, has spent the past week on trial with the Premiership club, as he looks to break into the professional game.
"I'm very excited to have had a shot with Bolton," Dallman said in the News of the World.
"But if I don't sign, I have a trial with Bayern Munich and I am in contact with several other clubs."
Dallman comes from a footballing family, as his father played American college soccer for Portland State University, while his great grandfather in Roderick Welsh played in England for both Portsmouth and Port Vale.