There's two I can think of, maybe three. I know that at the 1999 World Pool Championships, Efren ran something like eight racks (or nine) on Francisco in the semifinals. In the 2000 WPC, Morro Paez won nine games in a row on Earl, and most if not all, were run outs. I have the DVD's of these matches.
In an earlier Sands Regency tournament, Danny Medina broke and ran nine racks, but I forgot who his opponent was. And I was sitting right there as the TD. I believe Accu-Stats has this match on tape. Earl had so many six and seven rack runs back then, that there must be some on tape as well.
That's all I can think of right now.