SEATTLE -- Jeff Weaver does not deflect any of the blame. The Mariners right-hander admitted on Tuesday that he committed a grievous pitching sin, allowing an early five-run lead to be wiped out in Seattle's 10-6 loss to the Los Angeles Angels.

"There is no one to blame except myself," said Weaver, who worked 4 1/3 innings, allowing eight hits and five runs. "Everybody did their job. I just gave away a big lead early. I got away from my game plan a little bit."

From his perspective, the big lead provided a false sense of security. He said he became overly aggressive, his most glaring error.

"I continued to pound the zone," he said, "When I got ahead in the count, I should have made some chase pitches. I made some mistakes with some balls in the zone."

Either Weaver's deliveries were not enticing enough for the patient Angels hitters to chase, or catcher Kenji Johjima was not setting the target far enough off the plate.

What further contributed to Weaver's collapse had as much to do with him getting away from his game plan as having things taken away from it. He couldn't figure out home-plate umpire Larry Poncino's strike zone, particularly to left-handed hitters.

It cost him dearly in the third inning, when the Angels began gathering offensive confidence with back-to-back home runs by Gary Matthews Jr. and Kendry Morales to make it 5-3. Weaver believed he had Matthews struck out on a 2-2 pitch that was called a ball by Poncino.

Matthews, a switch-hitter hitting from the left side, then connected on a 3-2 pitch. That was followed by another long shot by Morales, a switch-hitter also hitting from the left side. He hit a 1-0 pitch 370 feet into the right-field bleachers.

"I wanted to pound in the left-handers but just wasn't getting any strike called on the inside of the plate," Weaver said. "From there, I got away from the hard stuff in, and they made me pay for that.

"It definitely changed my idea how to pitch and the game plan we had to start the game with. That's proof in itself to continue to stick with it regardless of what's getting called. I made the mistake of getting away from it."

Johjima said, "I understand that frustration. And I'm sure it was tough for him, but showing that to the umpire would not help us at all. It would only bring negatives.

"He didn't show his frustration. He was patient and worked hard."

Mariners manager John McLaren emphasized that Weaver threw extremely well to start the game.

"Then there were some pitches he didn't get. He got a little frustrated," McLaren said. "It looked like he was hitting his spots pretty good. He had good velocity, good breaking stuff. It just seemed like he started centering the ball more."

It all came apart in the fifth when the Angels scored two more runs to tie the game at 5. Jeff Mathis, the No. 9 hitter, opened with a double to the right-center gap. With one out, Orlando Cabrera hit a RBI single. Vladimir Guerrero followed with a double to left, sending Cabrera to third and Weaver to the dugout. The tying run scored on Garret Anderson's sac-fly to center.

"In the fifth inning, they just became really aggressive, hitting some first pitches," Weaver said. "I might have gotten away from my game plan with that big lead.

"What's frustrating is the end result. It's not a reason to let anything get away from you. I felt in control the whole game. I was throwing it where I wanted it to. They made adjustments during game, I made the wrong ones."