Hasselbeck threw for 216 yards and two touchdowns with newly signed Edgerrin James watching on the sideline Saturday night, leading the Seahawks to a 14-10 win Saturday night.
James, the NFL's active rushing leader, signed with Seattle on Tuesday and went through pregame warmups with the team. By the time the game rolled around, though, he was in sweats, pen and notepad in hand.
Hasselbeck put on a good show for his new teammate, leading the Seahawks on scoring drives to end the first half and open the second. He was at his improvising best in the second quarter, turning a botched run into an NBA-style 17-yard completion to T.J. Houshmandzadeh.
"The ball just popped right out like a football follies kind of video and there was T.J.," Hasselbeck said. "I kind of gave him a little chest pass and he did the rest. Not Bob Cousy, but Bob Cousy-esque."
Kansas City had more of a Washington Generals night.
The Chiefs had a woeful game on offense, going 1 of 10 on third down, missing two field goals and scoring their only TD on defense. Worse yet, Kansas City lost two starters in the game's first three minutes: Cassel and cornerback Brandon Flowers (shoulder). Receiver Devard Darling also had to be helped off in the second quarter, favoring his left leg.
For a team that's trying to rebuild from a two-win season, this was not a good night.
"Disappointing across the board for me tonight, as a team," Chiefs coach Todd Haley said. "I feel like after making some progress in Week 2, we went backward tonight."
Cassel was the biggest blow.
He was injured the first time he dropped back to pass, dragged down from behind by Brandon Mebane after the pocket collapsed. Cassel called timeout, then limped down the tunnel toward the locker room with a left leg injury and didn't return.
Signed to a a six-year, $63 million contract in the offseason, Cassel had a so-so first preseason game against Houston, then spent last week's game against Minnesota running for his life because of numerous offensive line breakdowns.
He was supposed to play into the third quarter against the Seahawks and show what he can do with more of the playbook available. Now, it's not clear if Cassel will even be available for next week's preseason finale against St. Louis.
The Chiefs haven't won any kind of game in nine months, a stretch that could continue to grow if Cassel is out for an extended period.
"We just have to get over that hump," said backup quarterback Tyler Thigpen, who may have hurt his chances of making the team by going 8-for-15 for 56 yards. "We had three close games that we could have won in the fourth quarter. That was a hump we couldn't get over last year and it kind of carried over."
Hasselbeck got off to a rough start, too. His first pass was tipped at the line of scrimmage and picked off by Flowers, who returned it for a 28-yard touchdown for Kansas City's first turnover of the preseason.
Hasselbeck was steady after that, moving the Seahawks into scoring position four times in the first half despite playing behind an offensive line missing two starters. He kept one drive alive with the chest pass to Houshmandzadeh, then hooked up with him again for an 8-yard touchdown pass that tied the game at 7.
Hasselbeck moved the Seahawks quickly down the field to open the second half, hitting John Carlson on a 28-yard touchdown pass to make it 14-7. He was done after that, finishing 19 for 25 in what's likely to be his last significant action before the regular season.
"Matt was sharp," Seahawks coach Jim Mora said. "It is good to see the timing between him and the guys is coming along."
No question Hasselbeck is all the way back from last season's back injury.
The kicking game? It became more murky instead of clearing up.
Olindo Mare and Brandon Coutu went a combined 0-for-3 against the Chiefs, with Coutu coming up 10 yards short on a 50-yard attempt and Mare missing wide left from 51 and 27 yards. With the first round of cuts coming on Tuesday, a front-runner has yet to emerge.
"That wasn't a real positive for us," Mora said. "That will probably come right down to the wire."
Chiefs S Jarrad Page was expected to play, but didn't suit up. ... Chiefs K Ryan Succop made a field goal from 35 yards in the fourth quarter, but missed from 28 yards and had a 53-yard attempt carom off the crossbar with 4 seconds left in the first half.
After being released by the Buffalo Bills, running back Fred Jackson is looking for an opportunity to reunite with former teammate Marshawn Lynch in Seattle.
Jacksonville Jaguars owner Shad Khan would like to sign a long-term extension to have his team play an annual game in London.
Browns quarterback Johnny Manziel says he's had to manage elbow soreness since his freshman year in college, and that he does not need surgery.
The Steelers have created nearly $6 million of cap room for this season after restructuring the contracts of Antonio Brown, Heath Miller and Shaun Suisham, sources told Adam Schefter.
Martavis Bryant, who faces a suspension for violating the NFL's substance abuse policy after multiple failed drug tests for marijuana use, faces issues that go beyond football, Mike Tomlin said.
Robert Griffin III has yet to comment on losing the Washington Redskins' starting quarterback job to Kirk Cousins, but he did take to social media to address another matter Monday night.