PGA Tour records: Lowest 18-, 36-, 54- and 72-hole scores

With his first two rounds at the 2017 Sony Open in Hawaii, Justin Thomas set the all-time PGA Tour record for the lowest first 36-hole total in an event. Thomas shot 59 in the first round — then the eighth sub-60 round in PGA Tour history — and then backed it up with 64 to […]