How did I do this?

I went to play some DJ, almost to mastery lvl 5 with her, and this game went pretty well for such an odd pair we had. Lee Sin Mid and Darius Jungle. Lane went pretty well, I was able to keep Tahm and Vayne zoned while Draven farmed and actually got them both quite low with constant harass from both me and Draven. Lee and Dar were just destorying this Gragas Mid. After the game I went to check the damage chart and see how much everyone did. I had the most damage dealt to champions with 18962, Draven was in second with 17826. How on earth did I manage to out damage a Draaaaaven??? Or even a mid full damage Lee Sin?