"As the game went longer and longer, Phil finally came up to me and said get ready and get your spikes on. I may need you," the 43-year-old ace said. "Sometimes he jokes with me, but I knew he meant it."
Clemens came out of the bullpen to boost his team, then Chris Burke ended the longest postseason game in baseball history with a home run in the 18th inning, lifting the Astros over the Atlanta Braves 7-6 Sunday and into the NL Championship Series.
The Rocket's rescue also gave him a measure of redemption. Making his first relief appearance since 1984, he pitched three dominant innings and atoned for a poor start in Game 2.
Now, manager Phil Garner's team gets a matchup against the St. Louis Cardinals -- the same club Clemens lost to in Game 7 of last year's NLCS.
"I love this, this is why you get off the couch to play this game," said Clemens, who came out of retirement two years ago to pitch for his hometown club. "I've been fortunate to have played in a lot of big games, but it's still exciting."
The Braves took a five-run lead into the eighth, and were poised to send this first-round series back to Atlanta for a decisive Game 5 Monday night.
Then, at 6-all, the Braves and Astros began the real endurance test that wound up lasting 5 hours, 50 minutes. The previous longest postseason game also occurred in Houston -- the New York Mets clinched the 1986 NLCS with a 16-inning win at the Astrodome.
"I'm sure proud of the guys," Clemens said. "It's been a lot of work for us. How 'bout the kid?"
Standing next to Clemens, the 25-year-old Burke was beaming.
"I'm just glad I could do my part," Burke said. "It was draining, mentally draining."
When Burke hit the homer, Clemens was in the dugout tunnel with Craig Biggio, the 39-year-old second baseman who has spent his entire career in Houston.
"We were like two tired old men walking out of the tunnel, and then we were like two kids having a good time," Clemens said. "We were holding each other up."
The Astros get a few days to rest. The NLCS starts Wednesday night at Busch Stadium.
"If he comes in a game like that, you know it has to be important to him," Jones said. "He was going to try not to make any mistakes, and he didn't. He pitched great."
Clemens gave up one hit and struck out four, setting up the first NLCS rematch since Pittsburgh and Atlanta played in 1991-92. Last October, Clemens could not hold an early lead in Game 7, denying the Astros their first World Series appearance.
The loss marked another early October exit for the Braves, who have won an unprecedented 14 straight division titles but have just one World Series crown to show for it. The Astros eliminated Atlanta last year.
"It never feels good, but I've had a couple of heartbreakers where I could have won the game, but instead ended the season," Chipper Jones said. "You learn from that."
The Braves wasted an early grand slam by Adam LaRoche. Berkman's shot made this the first postseason game ever with two slams.
Burke entered the game in the 10th inning as a pinch-runner. He came up with one out in the 18th against rookie Joey Devine, and launched a drive over the left-field wall.
Burke was mobbed his teammates at the plate after only the seventh series-ending home run in history, and the first since David Ortiz sent the Red Sox over the Angels in the 9th inning of Game 3 in the 2004 ALDS.
Batting just before Burke, Clemens took a mighty swing and missed against Devine before striking out. Clemens has never hit a home run in the majors.
Clemens first entered the game as a pinch-hitter in the bottom of the 15th, and had a sacrifice bunt after a leadoff walk by Biggio. But after another walk, Morgan Ensberg grounded into an inning-ending double play.
"It was kind of a microcosm of our season," Burke said. "Started out slow, finished strong."
The Astros started off 15-30 before rallying to claim the wild-card spot, though they finished 11 games behind St. Louis in the NL Central.
About three hours before the game finally ended, Ausmus hit his unlikely homer off Kyle Farnsworth. In the eighth, Farnsworth -- the latest in a long line of Atlanta relievers to fail in the postseason -- gave up the grand slam to Berkman after replacing Tim Hudson.
Ausmus, with just three homers in 134 regular-season games, hit a ball that ricocheted off a column in left-center field -- just above the yellow line signifying a home run. Had it hit about a foot more to the left, the ball would have still been in play and Ausmus held to a double.
The Astros thought they had another homer to win it in the 10th, but Luke Scott's drive down the left-field line curled just left of the pole. The crowd was already in a frenzy before realizing the ball had been called foul -- TV replays confirmed that it was. Scott grounded out on the next pitch.
Atlanta led 6-1 when Hudson, the Game 1 loser pitching on three days' rest, allowed the first two hitters to reach in the eighth and was pulled. Biggio reached on a fielder's choice grounder and Scott walked before Berkman's grand slam, an opposite-field shot into the seats in left.
Farnsworth managed to preserve the lead then, getting Ensberg on a called third strike before Mike Lamb's flyball that right fielder Jeff Francoeur caught on the warning track. He didn't have the same success against No. 8 hitter Ausmus an inning later.
LaRoche hit a grand slam in the third off Astros starter Brandon Backe, who loaded the bases after walking two batters and hitting another. Andruw Jones added a sacrifice fly to put the Braves up 5-0 in the fifth.
Brian McCann, the rookie catcher whose three-run homer off Clemens was the big blow in Game 2, put the Braves up 6-1 when he led off the eighth with a homer. McCann grounded out leading off the 17th in a rematch against the future Hall of Famer.
- There were 553 total pitches. Clemens threw the last 44 of Houston's 299 pitches.
- Nicole Oswalt, the wife of Astros pitcher and Game 3 winner Roy Oswalt, sang the national anthem before Sunday's game and God Bless America during the seventh-inning stretch.