Seattle ? The young Seattle Seahawks realize they’ll make plenty of mistakes when they lose. Matt Hasselbeck and Orlando Huff showed they’re also learning how to get it right.

Hasselbeck had his best performance of the season, throwing for career highs of 362 yards and three touchdowns as the Seahawks beat the Kansas City Chiefs 39-32 on Sunday. He completed 25 of 36 passes without an interception.

“I’m comfortable, and I guess that’s part of the maturing process,” said Hasselbeck, who is in his fourth NFL season. “Part of it is that our young guys are really playing well. I’m going to have a better day if those guys improve.”

Shaun Alexander ran for 145 yards on 23 carries and sealed the victory for Seattle (4-7) when he ran for a 46-yard touchdown on a counter play that made the score 39-25 with 1:52 left.

“This is the most positive team I’ve ever been on,” Alexander said. “Every week, everyone feels like this is going to be the week that we play like Super Bowl champions.”

Kansas City’s Priest Holmes ran for 197 yards and two TDs on 23 carries and caught seven passes for 110 yards, including a screen pass from Green that went for a 64-yard TD and a 17-7 lead midway through the second quarter.

The Chiefs (5-6) pulled to 39-32 in the final minute when Trent Green threw a 15-yard scoring pass to Marc Boerigter with 31 seconds to play, but Bobby Engram recovered the ensuing onside kick for Seattle.

“I’ve never been involved in a game where a running back had nearly 200 yards running but we still wound up minus-one in the turnovers,” Kansas City coach Dick Vermeil said. “And that was a huge turnover.”

Credit Huff for that one.

He made a huge play when he intercepted a pass by Green after the Chiefs reached Seattle’s 1-yard line just before the half. Huff made an athletic play, dancing to keep his feet in the end zone with the Seahawks trailing 17-14.

Seattle's Shaun Alexander runs 46 yards for a touchdown. The Seahawks held off the Chiefs, 39-32, on Sunday in Seattle.

“I knew I had my hands on the ball, so it was just a matter of getting my feet down,” said Huff, a second-year player. “I thought I had it, but I knew I had it after I looked up and saw the replay.”

The officials needed another look, too. They initially ruled Huff didn’t have possession but the play was overturned after a review when Seattle challenged the decision.

“We could have gone up 24-14 and it would have been a different game,” Green said. “All of a sudden, we gave them a lift.”

Hasselbeck took over from there with 59 seconds, working the clock and marching the Seahawks downfield.

Hasselbeck capped the drive with a perfectly placed 6-yard TD pass to rookie tight end Jerramy Stevens, who beat Eric Warfield with a great catch over his head for his first NFL touchdown. That gave the Seahawks a 21-17 lead before the break.

“I just put the ball somewhere for him to make a play,” Hasselbeck said. “I give him all the credit. It’s something we’ve been working on after practice. There were 10 seconds left in the half, and I didn’t want to blow it.”

While the Seahawks have allowed 170.1 yards rushing a game to rank as the NFL’s worst run defense, the Chiefs came in ranked last against the pass and in total defense.

It clearly was Hasselbeck’s best effort of the season, coming four weeks after he took over as Seattle’s starting quarterback when Trent Dilfer went out for the season with a torn Achilles’ tendon.

“He has played well,” coach Mike Holmgren said. “By all standards you measure a quarterback, he’s done OK.”

Even with Seattle down 10-0 after the first quarter, Hasselbeck kept his poise. He completed 10 of 12 passes to finish the first half, throwing for two TDs, and completing 11 straight at one stretch during the second half.

“Every week, he gets better,” Alexander said.

Hasselbeck threw eight passes for 168 yards to Koren Robinson and six for 92 yards to Darrell Jackson, who played for the first time since his postgame seizure in a Dallas locker room Oct. 27.

“Catching the first one was a big thing, but I felt fine,” Jackson said. “I’m happy to be back making plays for the team.”

Green completed 26 of 34 passes for 343 with one TD and one interception.

Notes: LB Anthony Simmons returned for the Seahawks, playing for the first time since opening week because of a high ankle sprain. … Holmes scored his 20th TD of the season, breaking the Chiefs record of 19 by Abner Haynes in 1962. … The Seahawks had their first 100-yard rusher, 300-yard passer and 100-yard receiver since Sept. 15, 1985, at San Diego. That day, Curt Warner ran for 169, Dave Krieg threw for 307 and Darryl Turner had 121 receiving yards.