Some people get all of the attention. They are the person whose name is on the marquee, the person everyone has come to see. The star quarterback, the famous singer, or legendary actor... they all have one thing in common. They all have a supporting cast. The offensive line, the musicians who play the music, or literally - the supporting cast, all play an important role in making sure that the people whose names we do know become/remain successful.
Sometimes we see these people, sometimes they remain anonymous. Just know that they are no less important that the names on the marquee.