Rooney's place in the side has been the subject of speculation after a subdued performance during Saturday's defeat to Italy.
Despite plenty of debate as to where his best position is, Welbeck believes that the 28-year-old remains one of the Three Lions' most effective players.
"Wayne Rooney is a class player," he told reporters. "Wherever he is on the pitch he makes an impact. All our forwards can play in different roles."
England continue their World Cup campaign on Thursday when they face Uruguay.