By PGATOUR.COM staff

Phil Mickelson could challenge the PGA TOUR's 72-hole scoring record in the final round of the Waste Management Phoenix Open on Sunday. With a six-shot lead at 24 under through 54 holes, Mickelson will need a 64 at TPC Scottsdale to break the record.

Golf fans have several viewing options available, both via television and online platforms.

Golf Channel will have final-round coverage from 1 to 3 p.m. ET. NBC will finish the broadcast from
3 to 6 p.m. ET.

The final round will also be streamed online here at PGATOUR.COM from 1 to 3 p.m. ET for Comcast subscribers only. Everyone will be able to view the online live stream beginning at 3 p.m. ET.

Furthermore, Golf Channel "Spotlight" coverage will continue in the final round. Coverage of the 15th, 16th and 17th holes will air live on Golf Channel while NBC is on the air with its tradtional coverage from 3 to 6 p.m. ET. The "Spotlight" coverage will end at 5 p.m. ET and viewers will be directed to the final hour of NBC's broadcast.

Please check back on Sunday for the lastest news and updates.

Phil Mickelson has shot 24-under 189 through three rounds at the Waste Management Phoenix Open (TPC Scottsdale is par-71) and needs a final-round 64 or better to set a PGA TOUR record. Here are the low 72-hole scoring marks on TOUR:

SCOTTSDALE, Ariz. -- On a day when nearly all the record 179,022 fans seemed to be cheerng for him, Phil Mickelson calmly went about his business and extended his lead at the Waste Management Phoenix Open.

Twice players pulled within three strokes of him but each time Mickelson met the challenge -- and then some. He closed his round of 64 with four straight birdies, and five in his final six holes, to move to 24 under and open a six-stroke advantage over Brandt Snedeker.

"At this golf course especially you've got to keep it going because you'll get passed pretty quickly," Mickelson said. "So you do have to keep focused on making birdies because guys are doing that, and they will catch you. But sometimes when you get it going, you start thinking about the numbers and it will stop you from pushing forward. 

"That's one of the things that I have tried to do this week is just keep pushing, just keep trying to make birdies and hit good shots, get after pins and play aggressive, get good pace on the greens and make some putts, because if I don't, you will be caught pretty quickly.
 
"Same thing goes tomorrow.  I've got to go out and make some birdies and keep it going."

The exclamation point to the round came at the 16th hole where Mickelson's 9-iron tracked tantilizingly toward the hole before stopping 20 inches shy.

Snedeker, who tied for second last week at the Farmers Insurance Open and was third in the season-opener on Maui, fired a third-round 65. Trailing by eight are Padraig Harrington and Ryan Moore, who shot 63 and 65, respectively on a sun-drenched Saturday in the desert.

Mickelson, who is bidding to win the Waste Management Phoenix Open for the third time, tied the event's 54-hole scoring record and was one stroke off the all-time PGA TOUR mark for 54 holes. He has never shot lower than 17 under for 72 holes at TPC Scottsdale in 22 previous appearances.

SCOTTSDALE, Ariz. -- The Waste Management Phoenix Open set a single-day attendance record on Saturday with a number that many PGA TOUR events would love to have for the week.

The crowd was announced at 179,022 -- which beats last year's all-time record by 5,812 people.

The biggest week ever was in 2008 when J.B. Holmes beat Phil Mickelson in a playoff and a total of 538,356 fans flocked to the course. If at least 71,327 fans attend Sunday's final round the weekly total will also be a record.

The crowd at TPC Scottsdale on Saturday would have been Arizona's eighth-largest "city" and would be 17,303 people larger than the nearby city of Tempe.

SCOTTSDALE, Ariz. -- First it was Padraig Harrington, now Brandt Snedeker is giving chase.

But Phil Mickelson continues to make enough birdies to maintain a comfortable cushion as the third round of the Waste Management Phoenix Open winds down on a spectacularly sunny Saturday at TPC Scottsdale.

Snedeker birdied both of the par 5s on the back nine -- getting up and down from beside the 13th green and two-putting from 44 feet at the other -- to pull within three strokes of Mickelson at 17 under.

But just as he did when Harrington closed to the same deficit, Mickelson answered with his own birdie at the 15th to move to 20 under. The leader has not made a bogey and is 5 under for the day.

WATCH: Harrington kicks a football into the stands at the par-3 16th

SCOTTSDALE, Ariz. -- As Phil Mickelson heads to the back nine, Padraig Harrington eagled the 15th hole to pull within three strokes of the leader.

Harrington, who started the final round nine shots off the pace, hit his drive 333 yards at the par 5, He had 245 yards to the pin on the island green and put his approach 9 feet away for the eagle.

Harrington, who is making his debut in Phoenix, then proceeded to endear himself to the crowd at the 16th hole when the Irishman started kicking official Super Bowl footballs into the stands.

His caddy, who was serving as the holder for the first -- which was field goal style -- did his best Lucy imitation, pulling the football away when Charlie Brown, err, Harrington ran up to kick it.

Harrington did manage to put the second attempt in the grandstands, and he drop-kicked several more into the crowd. As the fans chanted "Ole, Ole, Ole," though, Harrington missed the 16-footer for birdie. He then converted from 4 feet for par to stay within three of Mickelson.

SCOTTSDALE, Ariz. -- Hunter Mahan and Padraig Harrington are feeding off each other during the third round of the Waste Management Phoenix Open.

Harrington just bounced back from his lone bogey of the day with a two-putt birdie on the par-5 13th. His seventh birdie has moved the Irishman into sole possession of second place at 14 under, five strokes behind Phil Mickelson.

Harrington is playing in the Waste Management Phoenix Open for the first time.

Mahan is among the group at 13 under along with Troy Mattesson, Brandt Snedeker, Bill Haas and Keegan Bradley. The 2010 Waste Management Phoenix Open champ has made five birdies -- and the last, which at the 13th hole, was particularly creative after he drove under a cactus branch and had to putt lefthanded back into the fairway left-handed, then holed a bunker shot.

SCOTTSDALE, Ariz. -- Phil Mickelson quickly shook off that double bogey he made on the 18th hole Friday with a 20-footer for birdie on his first hole of the third round.

So Mickelson is now 18 under and owning a five-stroke lead but the rest of the leaderboard is quickly changing. Padraig Harrington is currently his nearest challenger after making the turn in 30 with five birdies on the front nine, including three straight to open the round.

Troy Matteson and Robert Garrigus, who lives about 25 minutes away from Scottsdale, both birdied the third and fourth holes to get into a big group at 12 under. Also at that number are Ryan Moore, Brandt Snedker, Keegan Bradley and Bill Haas, who three-putted from the fringe at the first hole.