Although Tom Cleverley's four-week absence with damaged ligaments has offered a route back to the first team, the Geordie is disappointed at his team-mate's extended absence.
"The young lads have come out flying," said Carrick.
"It is great to see them bursting through. The buzz around the squad is fantastic.
"There is enthusiasm and energy and the whole thing has gone up a notch. That has shown on the pitch, so Tom's injury is a bitter blow."