9. Chris Jericho - 10 Matches
A WWE veteran, it isn't surprising to see Chris Jericho rack up an impressive ten SummerSlam matches. His debut came at the 2000 event, in a two out of three falls match against Chris Benoit. With only thirteen minutes to work in on the undercard, that one was criminally short. He went on to main event the show as part of 2003's Elimination Chamber, but he's mostly been a gap filler in his other SummerSlam matches. It has sort of been the story of his career, Mr Reliable, but not always Mr Main Event.