Try telling Roger Clemens he doesn’t have anything left to prove.

Fresh off one of his most dominating performances of the season, Clemens will look to continue his fantastic start and earn his 332nd career win when the Houston Astros play the deciding game of their series with the visiting Arizona Diamondbacks.

Already a surefire first-ballot Hall of Famer, Clemens has defied the odds and his age through his first eight starts. The 42-year-old right-hander is just 3-1, but could be 8-0 with a little more help from the Houston offense.

Clemens leads the majors with a staggering 1.11 ERA, allowing just seven earned runs all season. He dazzled the San Francisco Giants in a 4-1 win Saturday, giving up one run and five hits over a season-high eight innings.

San Francisco manager Felipe Alou was impressed with Clemens’ variety of pitches.

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“He has so many pitches that you have to figure out. He throws splits, sliders, curves, fastballs in and out, he throws everything,” Alou said. “He’s not like (Randy) Johnson, who throws a high number of fastballs. He uses different stuff in different zones.

“I’ve never seen him when he didn’t use all of his pitches effectively. He’s still a pitcher, he’s always been a pitcher,” Alou added.

The Rocket walked none and struck out a season-high 10. It was the 109th time Clemens has struck out 10 or more, third on the career list behind Nolan Ryan and Johnson. The last time Clemens did it was Sept. 24, when he fanned 12 in Milwaukee.

The Astros have scored just 15 runs for Clemens over his first eight starts, with six of those games decided by one run.

“It was good to get some production, especially on a night when Roger pitched, because he certainly deserved better than we’ve given him to this point,” Astros outfielder Lance Berkman said.

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The Astros’ three-game winning streak came to an end with Wednesday’s 7-6 loss. Down six runs through five innings, Houston rallied and pulled within two heading into the ninth. Craig Biggio homered to pull the Astros within one and they loaded the bases with two out before Adam Everett lined out to third to end the game.

Troy Glaus went 3-for-5 with a two-run homer for the Diamondbacks, who have won six of eight.

The Diamondbacks placed closer Brandon Lyon on the 15-day disabled list Wednesday night because of mild tendinitis in his right elbow.

Lyon had been held out of Arizona’s last five games after pitching in three straight last week. He was feeling some discomfort in his right arm following that stretch and Diamondbacks manager Bob Melvin chose to be cautious with Lyon, who missed all of the 2004 season after having surgery on the ulnar nerve in his elbow.

“This will give us time to make sure he’s 100 percent,” Melvin said, “and that his mind is clear before we bring him back.”

The Diamondbacks promoted infielder Matt Kata from Triple-A Tucson to take Lyon’s roster spot.