Young said: “Since Scott came to Charlton he’s been an absolute revelation and made save after save.
“A lot of the clean sheets we’ve been getting have been largely down to Scott making a number of saves late on in games.
“He did it again on penalties against Chesterfield and basically got us through to the quarter-finals.
“It’s early days with Scott at the moment and he’s only 21.
“People forget that because he looks a lot older, but give him time to settle into a Premiership club and he will become a top, top goalkeeper.”
He added: “Ben Foster, Chris Kirkland and Scott are the three challenging Robbo now because McClaren probably thinks David James is a bit too old.
“With the way Scott is playing there is no reason why he can’t be in and around the squad and pushing hard for a place.
“He’s a very good keeper to play with. He always lets you know if there’s a man coming and where you should be.
“If you’re not in the right position then he’ll let you know and as a defender that’s what you want.”
