Dewsnip has worked with the trio, who he considers to be some of the greatest players he has ever coached, during their younger years, and he believes Barkley has a similar x-factor to his more experienced colleagues.
Rooney and Gerrard have gone on to become legends for club and country, and Dewsnip feels that Barkley has the potential to do the same.
“Even as a baby, Steven could pass it from one side of the field to the other with great accuracy,” Dewsnip says. “It took your breath away and his shooting from outside the box was incredible.
"I’ve been very lucky to see Steven and Wayne [at young ages] and I might add Ross Barkley into that, as well. When they do come along, you know it’s different. They tend to have something magical, that makes you go: ‘Wow. That’s the one.’”
Barkley's supreme talent has come to the fore this season, as the attacking midfielder starts to flourish and mature as a player.
There have been question marks over the Everton man's end product for much of his career to date, but he is rapidly finding a way to add those skills to his impressive arsenal.
Barkley has scored five times in his last 14 appearances for club and country, as he enhances his reputation as one of the most naturally gifted footballers in the Premier League.
Barkley scored in England's latest match against Lithuania, but his attention will now be switching back to club matters - with Everton facing Manchester United at the weekend.