User blog comment:Sifter66/Who is the most Underused/Underpowered Champion?/@comment-24.45.167.29-20130115045108

There is a significant difference in underused and underpowered. One means that they are unpopular for whatever reason, despite their clear viability, such as Trundle. Underpowered is like prerework Evelyn, who was just SO bad because Riot intentionally nerfed her into oblivion so they could fix her. An underused champion would be someone who is not used as much as they should despite their actual power.