Who has the second longest Jeopardy run?

I know Ken Jennings is number one, but there is a guy on now who I think can go for a long time. I don't know if he'll beat Ken, but I think he could get maybe second. I know Brad Rutter won the most money ever, but he was on when they could only go 5 days, so even though he's been invited back since, it hasn't been enough to get this record. Does anyone know who does have it?