League Leaders is an insert set in 2004 Skybox LE. L.E.ague L.E.aders get it? This 10-card set features leaders in some of the major statistical categories during the 2003 season. The set is not serial numbered and was inserted at a rate of 1:18 hobby and 1:12 retail packs. The set is fully paralleled by an Executive Proof set that is serial numbered 1/1 as well as a game used set.