Day 1 at Baltusrol

Keep that card

Martin Kaymer: The 2010 PGA Championship winner played in the afternoon wave and was the only one to make a move in the tough conditions. Kaymer shot a 4-under 66 and trails Jimmy Walker by just a stroke. Kaymer, who started on No. 10, had a lone hiccup, a bogey at No. 2. But he rolled in birdies at No. 1 and No. 3 and closed with six pars.

Toss that card

Dustin Johnson: Take your pick of guys who didn't carry the momentum from Royal Troon two weeks ago across the pond to New Jersey. Johnson is by far the most surprising. The U.S. Open winner also placed in the top 10 at the Masters and at the British Open. To keep that streak alive, he'll need one giant turnaround. Johnson finished Thursday with two double bogeys and one birdie en route to a 7-over 77. That's good for 143rd place out of 156 golfers. Johnson's score was worse than all but five of the 20 club pros in the field.

On the course with …

Brooks Koepka: The 26-year-old completed his first round since Sunday at the U.S. Open and finished with a 2-under 68. Koepka had to pull out during the first round of the Bridgestone Invitational because of torn ligaments in his right ankle, and he probably wouldn't be playing this week except that it's the final major of the year. Walking 18 holes for the first time since the final round at Oakmont was the first big test. And he had enough power to make eagle on the 18th and four other birdies to offset his mistakes. Koepka was No. 3 in the U.S. Ryder Cup standings when he stepped away in late June. A month later, he is down to No. 9. Points count double at a major, so Koepka has a good chance to move back into the top eight that automatically qualify.

PGA moment

Rory McIlroy had 35 putts and no birdies. The four-time major champion was fooled by the poa annua greens at Baltusrol all day, which looked faster than they actually were. McIlroy's 74 was the first time he failed to break par in the opening round of the PGA Championship. Thursday's round included a pair of missed 10-foot putts on his first two holes and misses from 8 feet and 5 feet later in the round. "I can't remember the last time I went without a birdie," McIlroy said. Some five hours after his round ended, McIlroy returned to the grounds to work on the practice greens.

Chip shots

• Is Rickie Fowler turning a corner? He was a combined 25 over par in the first round of his previous seven majors. He shot a 2-under 68 on Thursday.

• Russell Henley and Robert Streb were the only players to finish Thursday bogey-free. Both shot 68.

• World No. 1 Jason Day shot a 2-under 68. Day has posted rounds in the 60s in 10 of his past 13 PGA Championship rounds.

Key hole

Par-5, 548-yard No. 18: Walker had a two-putt birdie from 40 feet at the turn to take the lead for the first time and kept it the rest of the day. Five players made eagle, but Johnson dunked his tee shot into the water and made bogey.

Quote of the day

" It would be nice to make it six out of seven, wouldn't it?"

— Ross Fisher, when told five of the past six major championship winners have been first-timers. Fisher is one shot out of the lead.

Tweet of the day

"Rich Beem being seven up on DJ right now means you should literally never bet on golf again."

— Kyle Porter, golf writer for CBS sports (@KylePorterCBS)

Day 2

The overnight forecast called for "heavy thunderstorms" until after sunup. Clear conditions after that on a wet, soft course means players in the afternoon should have the advantage. TNT picks up coverage at noon.