Current and previous (now Vancouver Titans) Runaway teams are a combined 33-1 dating back to the start of OW Contenders Korea Season 2 and currently sitting at a 26-0 record since winning that season.
With their last defeat coming to the hands of KDP (2-3) in the group stage they're on a combined 30 game win streak since then. That would date their last defeat back to July 22nd, 2018, and if you want to go even further back, to Overwatch Contenders Korea Season 1 their total record becomes 38-3.
Runner may have started this legacy but holy shit has Flowervin done hella lifting to keep it together and see it thrive.