Ayrshire, Scotland (My Sportsbook) - Tom Watson played his final 10 holes Friday as well as he's played any 10 holes in his storied British Open career.

The five-time British Open champion collected four birdies over those last 10 holes en route to an even-par 70, which helped him share the second-round lead at the 138th Open Championship with Steve Marino.

Marino carded a two-under 68 at Turnberry to earn his piece of the lead at five-under-par 135. Watson -- at 59 years, 316 days old -- became the oldest man to own at least a share of the lead after any round in major championship history.

Tiger Woods, meanwhile, missed the cut by a shot.

Watson has won the British Open and Senior British Open at Turnberry and has a record that dwarfs that of his co-leader.

Marino, who was born in 1980, is playing in just his fourth major championship and only his first British Open. Watson, who has played in all but three Open Championships since 1980, has as many Senior British Open titles (three) as Marino has top-10 finishes on the PGA Tour this season.

Mark Calcavecchia, the 1989 British Open champion, posted a one-under 69 and is alone in third place at four-under-par 136.

First-round leader Miguel Angel Jimenez posted two birdies on the back nine to recover a pair of his lost strokes. However, the Spaniard managed just a three-over 73 to slip to three-under-par 137.

He was joined in fourth place by three-time major champion Vijay Singh (70), two-time U.S. Open champion Retief Goosen (70), Ross Fisher (68), who owns two European Tour titles, and Kenichi Kuboya (72).

Kuboya became the only player to reach seven-under par for the championship with birdies on one and four. He slid down the leaderboard in part due to a lost ball on the 13th.

Woods, the three-time Open champion, struggled through the middle of his round, but staged a late rally. He poured in birdies on 16 and 17, but it wasn't enough for him to make it to the weekend.

He carded a four-over 74 to finish at five-over-par 145, one stroke over the cut line.

"Problem after problem," Woods said.

He birdied the sixth for the second day in a row to get to even-par for the championship, but carded three bogeys and two double-bogeys over the next six holes to tumble to plus-seven.

Woods needed to birdie his final three holes to make the cut. He got the first two at 16 and 17, then knocked his second over the green on the 18th. Woods pitched his third within three feet, but the closing par wasn't enough.

The world's No. 1 player missed the cut for the second time in a major as a professional and for just the sixth time overall since he turned pro in 1997.

Those six missed cuts include the 1998 AT&T Pebble Beach Pro-Am. That event was plagued by weather problems and was completed months after it started and Woods chose not to return when it was finished.

"I kept making mistake after mistake," Woods said. "You can't make mistakes and expect to make the cut or win the championship. I didn't play a clean card."

Watson opened his round with a 25-foot birdie putt on the first hole to tie Kuboya for the lead at minus-six. However, he tripped to a bogey on the second and that was the beginning of his problems.

The 59-year-old stumbled to four consecutive bogeys from the fourth to slide four strokes behind Marino, who had already completed his round.

"I knew the front nine was going to be the tough nine and I played some poor shots," Watson stated. "I figured the golf course was going to be in my favor coming downwind on the back nine."

Watson showed his mettle and started his comeback with a birdie on the ninth. He birdied the 11th to get back within two of Marino.

At the 16th, Watson rolled in a long birdie putt and poured in another long birdie try at the last.

"They were two no-brainers, field goals as my dad called them," Watson said of his late birdie putts. "Something is on my side right now it seems like. Things are happening my way."

Marino had an up and down front nine with three pars, three bogeys and three birdies. He bogeyed the second, but came right back with a birdie on the third. Marino dropped another stroke on the fourth and followed with birdies on five and six to move to minus-four.

At the par-five seventh, Marino dropped another stroke. His bogey on the 10th was his fourth and final bogey of the day.

Marino posted his fourth birdie of the round on No. 14, where he rolled home a 16-footer. After a pair of pars, Marino poured in a 20-footer for eagle at 17 to jump to minus-five.

"It was a totally different golf course. It played difficult out there today with the wind early and the rain. It was raining on and off early. It was one of the hardest courses I've ever played," Marino admitted.

For Marino, this is his first major championship of the season and just the fourth of his career. He has played two U.S. Opens (2007 and '08) and missed the cut both times.

In his third start in a major, the 29-year-old Marino tied for 60th at last year's PGA Championship.

Calcavecchia stumbled early, but rallied in the middle of his round. He dropped shots on two and five to dip to minus-one.

The 49-year-old birdied the par-five seventh for the second straight day and regained his other lost stroke with a birdie on the par-four 10th.

Calcavecchia birdied the 12th, then nearly holed his approach shot at the par- four 14th. He tapped in his birdie putt to gain a share of the lead at minus- five. However, he gave that stroke back with a bogey on the 15th, then parred his final three holes to end one back.

"Two and then four through 10 were really tough," Calcavecchia stated. "I think that's where most of the high scores are coming today. I got through them okay, then made a bomb on 10 and set myself up for a pretty good score."

Lee Westwood and J.B. Holmes both carded even-par 70 and ended two rounds at two-under-par 138. They share ninth place with Stewart Cink (72), Mathew Goggin (72) and James Kingston (71).

Jim Furyk (72), Sergio Garcia (69), Masters champion Angel Cabrera (70) and Camilo Villegas (73) are among eight people tied at minus-one.

Two-time defending champion Padraig Harrington (74) is tied for 53rd place at three-over 143.

The cut line fell at four-over-par 144 with 73 players moving on to the weekend. Along with Woods, there are plenty of big names that won't be around for the final two rounds.

Former Masters champion Mike Weir entered the second round tied for 10th place, but stumbled to an eight-over 78.

Weir dropped to five-over-par 145 and missed the cut. Weir ended alongside European Ryder Cup captain Colin Montgomerie (74), 2003 British Open winner Ben Curtis (80) and 2004 Open champion Todd Hamilton (70).

K.J. Choi (72), Tim Clark (75) and Anthony Kim (73) finished two rounds at plus-six, while former PGA Championship winner David Toms (75) was seven-over 147 after two rounds. He shot five-over 75 Friday.

U.S. Open champion Lucas Glover struggled to a 77 and missed the cut at plus- nine.