Final-round viewer's guide
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ROCHESTER, N.Y. -- Nineteen players are within seven shots of the lead heading into the final round of the final major of 2003, but just four of them have major championship trophies on their mantles.

Here are the players and trends to watch in the last round of major championship golf before April, all times Eastern:

Five feature pairings
3:05 p.m.: Shaun Micheel (-4), Chad Campbell (-4)
The two co-leaders, who coincidentally look strikingly similar, have one PGA Championship appearance (and no PGA Tour wins) between them, and carry a three-stroke edge into the final round. Expect a lot of greens in regulation, as they're both among the top 4 in the category this week. With 12 of the last 15 PGA champs making it their first major and the last six PGA winners coming from the last group, the odds are in these guys' favor. Campbell had the low round of the tournament Saturday (65), while Micheel bogeyed the final three holes after playing them at 3-under over the first two rounds. The fact that both of these players are in the same boat, having never been in this position before, will only help to put them at ease.

2:55 p.m.: Mike Weir (-1), Tim Clark (Even)
Weir reached 2-under on two occasions Saturday, but both times couldn't hold on. He's trying to become the first player to win The Masters and PGA Championship in the same year since 1975, and a victory Sunday would gift-wrap the Player of the Year title for him, as well. Weir is three back of the leaders, but that's nothing new for him: He has come from behind in all six of his career victories. Tim Clark, meanwhile, is flying under the radar. He's paired with a high-profile player for the second straight day (he was in Phil Mickelson's group Saturday). Worth noting: He tied for 13th at The Masters this year.

2:45 p.m.: Briny Baird (+1), Alex Cejka (+1)
You won't find a big gallery following this group Sunday. Both are relatively unknown players, though Baird has posted top-15s in his last three events, including a runner-up finish at the Buick Open. Both will have to be a little more aggressive than they'd like if they have designs on the Wanamaker Trophy.

2:35 p.m.: Ernie Els (+1), Billy Andrade (+1)
The Big Easy played the back nine in 2-over Saturday to drop to 1-over for the championship. If he can get out to a quick start -- he played the front nine in 2-under in the third round -- he'll be able to apply some pressure to the leaders. But he and Andrade -- who began the week as the third alternate -- need them to post over-par rounds to have a realistic shot at catching them.

2:25 p.m.: Vijay Singh (+2), Charles Howell III (+2)
These guys really need to make some birdies early to have a chance Sunday, though both have played the front nine over par in the first three days. They'll likely be a bit looser than the groups behind them but are likely too far back for it to matter unless the two leaders post big numbers.

Keep an eye on ...
Biggest final-round comeback: John Mahaffey staged the biggest final-round comeback in PGA Championship history in 1978, coming from seven down with a Sunday 66, ultimately beating Tom Watson and Jerry Pate in a playoff. Don't expect that type of comeback on a course as tough as Oak Hill.

Getting aggressive: Those who played conservative Saturday may have to change their game plans Sunday with Micheel and Campbell three strokes ahead. The course played two strokes easier Saturday than in either of the first two rounds, so there are some birdies to be had.

Tiger sighting: Tiger Woods tees off at 10:55 a.m. Sunday, four hours before the leaders. At 9-over, he's 13 strokes behind the leaders and in 43rd place, as far back as he ever has been after 54 holes of a major. If he shoots above 70 Sunday, it will mark the first time in his pro career he has been above par in all four rounds (that's in any tournament, not just a major). He's also in danger of posting his worst finish in a major, his previous low was a tie for 29th.

Sweep?: Fifteen of the top 19 players on the leaderboard -- including the top two -- are searching for their first major. Should one of them win, it would be the first year all four majors were won by first-timers since 1987.

The finish: The 17th and 18th holes are playing as the two most difficult at Oak Hill this week, playing to a stroke over par combined. Eight of the top 10 players on the leaderboard made at least one bogey over that span on Saturday.

David Lefort is the golf editor at ESPN.com, and can be reached at david.m.lefort@espn3.com.