Round 2 of the 2021 BMW Championship is not quite over after a long weather delay pushed the remainder of the round into early Saturday morning, but a few narratives have begun to emerge at Caves Valley Golf Club at this second event of the 2021 FedEx Cup Playoffs.Bryson DeChambeau became the primary storyline on Friday when he shot 60 to take a one-stroke lead into Saturday (although that may evaporate with Jon Rahm trailing DeChambeau by just one stroke and still on the course). DeChambeau has had a strange summer. It feels like he should have won — maybe twice — and he barely has one top 10. That’s because he’s had a few Sunday meltdowns, which is something to keep an eye on as the weekend progresses.He’s being chased by Rahm and Patrick Cantlay, both of whom trail by a single stroke. Rahm has been his usual all-universe self this week, and Cantlay is having — this is not an exaggeration — one of the great putting weeks in PGA Tour history. Either could easily surpass DeChambeau on Saturday. There are plenty of other narratives to follow as well, but those are the three most prominent (and also the three most likely golfers to win the tournament). Rory McIlroy, Sergio Garcia, Xander Schauffele and Hideki Matsuyama are all in the mix, though, and with low scoring abundant at Caves Valley, Saturday should be just as wild as the first two days.CBS Sports will be with you the entire way Saturday updating this story with the latest scores, analysis and highlights from Round 3 of the BMW Championship. Keep it locked here throughout the entire round, take a quick glance at the leaders atop of the page and view a more detailed leaderboard.