Michael Owen and Federico Macheda both got their names on the scoresheet in last night's 4-1 win over New England Revolution, while Dimitar Berbatov has pledged to regain the form that saw his grab a share of last season's Golden Boot.
But Rooney views that situation as a positive.
He said: "Competition is good. It keeps everyone on their toes. It is exciting to have so many strikers.
"It means everyone will have to be on top of their game to keep their place in the team."