Saturday was particularly long for many of the players at the 100th PGA Championship with dozens in the field having to finish their second round early in the morning and then return to the course for a full third round of action in the afternoon. Tiger Woods endured the extra holes, wrapping up a 66 and then shooting another 66 just a couple hours later. It's only the third time in Tiger's career he's posted 66 in back-to-back major rounds; the other two just so happened to be at the Masters in 1997 and 2005, both events Woods won. Brooks Koepka followed up his 63 on Friday morning with a 66 to leave him 12-under for the championship. He holds the 54-hole lead, followed on the leaderboard by Adam Scott, two strokes back at 10-under, and a trio of Jon Rahm, Rickie Fowler and Gary Woodland all three back at 9-under. So the two-time U.S. Open champion is in the lead and 14-time major champion Woods is in the top 10 along with the likes of Jason Day, Justin Thomas and Rickie Fowler. Saturday may have been a grind, but it has produced a stellar leaderboard of proven winners ready to make a run at claiming the final major championship of the 2018 season. Here's how the leaderboard looks going into Sunday's final round: 1. Brooks Koepka (-12): Thru 49 holes, the 100th PGA Championship was looking like a Koepka runaway win. The sudden reversal in fortune that was Koepka's back-to-back bogeys coming in on Saturday was less optimal for the golfer but increased intrigue for Sunday's final round. Koepka remains in the lead but no longer with a cushion that could allow him to play defense on his way to a third major championship. The good news for Brooks? There's been nothing from this week to suggest he can't go shoot a 65 or 66 on Sunday and lead the rest of the field in the dust. 2. Adam Scott (-10): Absolutely dialed in from the fairways, Scott led the field in strokes gained on approach shots in the third round. The chances he gave himself on the greens produced second-straight low round for the former Masters champion. T3. Rickie Fowler (-9): It's really incredible that Fowler is still right in the pack given the fight that was required in his third round 69. Fowler was pretty average statistically compared to the field on Saturday, grinding out pars and limiting the damage when he made mistakes, but thanks to his 65 on Thursday and strong play in the second round, a 69 was just good enough to stay in striking distance of Koepka. T3. Jon Rahm (-9): Rahm had birdie chances on nearly every hole, even when he missed fairways, and is currently riding a 36-hole streak of bogey-free golf. He's been such a force and such a character so early in his career that it's easy to lose track of the fact that he's still very new to this, and it seems like we're watching a potential all-timer figure out how to convert wins at a major championship. T3. Gary Woodland (-9): Woodland's putter had been one of the best clubs in his bag this week, but things got a little bit loose around the greens on Saturday during a round that started with putting a ball in the water on the 1st hole. If Woodland can get more good looks from the fairway, he could be a candidate to get that putter hot again and push for his first major win. T6. Tiger Woods, Jason Day, Justin Thomas, Charl Schwartzel, Stewart Cink, Shane Lowry (-8): What a packed group here, all still in contention but given the quality of the competition it's going to take a really low (thinking 64 or 65, minimum) to win on Sunday. So who from this group has the game to post that kind of score? A Tiger charge from behind could make this a win unlike any of his 14 others, but any of these other players and definitely the names closer to the leaders are just as capable of going low. CBS Sports was with you the entire way on Saturday updating this story with the latest scores, analysis and highlights from Rounds 2 & 3, so if you missed anything, catch up below. If you are unable to view the updates below, please click here. Thanks for stopping by.<doc-sep>The PGA Championship is on its way toward being decided Sunday with the Wanamaker Trophy on the line for the 100th time in its history. And if early play is indication, there should be plenty of fireworks coming home during Round 4 at Bellerive Country Club. The 2018 edition of the major is emanating from St. Louis with an absolutely loaded field featuring the world's best golfers. And the good news is that a significant number of those big-name stars are atop the leaderboard entering the fourth and final round of action. Strap in for complete coverage of the PGA Championship on Sunday from both CBS Sports and TNT. Bellerive Country Club brings with it a tremendous atmosphere that should favor big hitters and those successful in cleaning up around the green. That will make for great fun for those of us watching all day long. Enough talking about it. Here's how you can watch as much PGA Championship golf as possible on Sunday. Be sure to stick with CBS Sports for live coverage during the entire tournament with live streaming options available. All times Eastern Round 4 -- Sunday, August 12 Round 4 start time: 8:30 a.m. TV coverage (late): 2-7 p.m. on CBS TV simulcast live stream: 2-7 p.m. on CBSSports.com, CBS Sports App and CBS All Access How to get CBS All Access: Signing up is simple. Simply go to the CBS All Access landing page and pick the plan you want to purchase. Click here if you want to go straight to the free one-week trial. Just input the proper information, and you're off. Live streams: 11 a.m. to 7 p.m. on PGA.com Featured Group 1: 11 a.m. to 7 p.m. on PGA.com Fleetwood/Kodaira at 11:02 a.m. | Woods/Woodland at 2:35 p.m. Fleetwood/Kodaira at 11:02 a.m. | Woods/Woodland at 2:35 p.m. Featured Group 2: 11 a.m. to 7 p.m. on PGA.com McIlroy/Lorenzo-Vera at 11:11 a.m. | Koepka/Scott at 2:55 p.m. McIlroy/Lorenzo-Vera at 11:11 a.m. | Koepka/Scott at 2:55 p.m. Featured Holes 16-18: 11 a.m. to 7 p.m. on PGA.com TV coverage (early): 11 a.m. to 2 p.m. on TNT TV simulcast live stream: 11 a.m. to 2 p.m. on PGA.com (authentication required) PGA Championship Clubhouse Report: 8-9 p.m. on CBS Sports Network PGA Championship Round 3 Encore: 10 p.m. on CBS Sports Network<doc-sep>4:28 p.m.: Tiger striped an iron at the 11th, but his approach shot left quite a bit to be desired and he settled for par to remain at eight under. Meanwhile, up ahead at 12, we've got major drama, as Jordan Spieth had to hit a provisional off the tee but wound up finding his first ball in the trees. From there, he attempted to hit a heroic punch out that clipped a tree and went out of bounds, forcing him to hit another one from the same spot. He punched out and now has to somehow get up and down to "save" double. Going to be tough to come back from this one, even for a guy known for bouncing back.<doc-sep>
FOLLOW LIVE: Round 2 continues in our 2018 PGA Championship leaderboard live coverage for Saturday. Weather has suspended play for the day at the 100th PGA Championship at Bellerive Country Club. The second round will resume at 8 a.m. ET on Saturday with all players back on the course and in position to pick up where they stopped when the horn was blown on Friday. In order to get both the finish of the second round and the third round in on Saturday, the third round will be played in groups of three from both the No. 1 and No. 10 tees, beginning approximately 30 minutes after the conclusion of the second round. If everything goes according to plan, that would have the first groups starting their third round at approximately 12:15 p.m.. For some golfers that will be a quick turnaround, for others a long layoff. Anyone who finishes near the top of the leaderboard at the end of the second round will get a longer layoff with players who narrowly make the cut returning to the tee for action quickly. Rickie Fowler (-7) has the lowest score with second round action left to play, three strokes behind the leader Gary Woodland (-10). Billy Horschel and Pat Perez were also in the midst of a climb up the leaderboard when play was suspended with both reaching 5-under with less than nine holes to play. The action on Friday before the weather was highlighted by a pair of 63s from Brooks Koepka and Charl Schwartzel. Both players vaulted up the leaderboard, joining Kevin Kisner (-9), Dustin Johnson, Thomas Pieters and Fowler (all -7) in the top five. Johnson entered the round as the betting favorite, and remains firmly in the hunt after posting a 133 over his first two rounds, his lowest score through 36 holes at any major. CBS Sports was with entire way updating this story with the latest scores, analysis and highlights from Round 2. Be sure to check out our PGA Championship schedule and viewer's guide for updates on Saturday's slate. If you are unable to view the updates below, please click here. FOLLOW LIVE: Round 2 continues in our 2018 PGA Championship leaderboard live coverage for Saturday. Thanks for stopping by.