Yorick ult damage appears in end of game report
When Yorick ult´s someone and he dies within 10 Seconds He gets revived for 10 seconds. After 10 Seconds to kill the Ulti the revived Champion gets 100000 true damage. This damage you can see, since Patch 6.7, in the line of total damage delt to champions and true damage delt to champions. I think thats not supposed to be and maybe the damage delt has an influence on the rating system. Tested in a bot game. 8 deaths with ulti 800k trus dmg. http://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/2604414369/204948498?tab=stats