ST. LOUIS, AUG. 23 -- Brian Bosworth's NFL career opened to mixed reviews.

Bosworth, the high-priced Seattle Seahawks rookie linebacker from Oklahoma, made his pro debut Saturday night before a sparse crowd at Busch Stadium and had little impact on the game.

Seattle dropped a 28-21 decision to the St. Louis Cardinals before 25,390 spectators.

Seattle Coach Chuck Knox did not review Bosworth's play in detail after the game.

"We wanted to see him in there," said Knox. "In the middle like that, it's tough to tell {how well he played}. I'll wait till we see the film."

But Bosworth did not wait to evaluate his play.

"I wasn't confused out there," he said. "I know the defensive schemes. I didn't make a 3.3 {grade-point average} for nothing. I wasn't awed by it.

"Now, I know what it's all about. It's a growing experience, and I'll get better."

Bosworth signed a 10-year, $11-million contract last week.

But Bosworth said he "felt rusty." He said, "The difference between college and the NFL is speed. The players here are a lot faster. I'll have to get used to it."

Bosworth, selected by Seattle in the NFL's supplemental draft after deciding to forgo his final year of eligiblity at Oklahoma, played five series, plus one play in another, and had just two tackles. Running back Stump Mitchell ran by him for a 22-yard gain on Bosworth's fourth play.

The highlight for Bosworth came when he stopped Vai Sikahema on a fourth-and-one play late in the third period.

Bosworth said there was no intimidation from St. Louis players toward him.

"No one said anything to me," he said. "I wasn't expecting anyone to. I just mainly wanted to get in the game and see the difference between the NFL and college.

"I felt like I did in '84 when I played my first game in college {for the Sooners} at Stanford. You have to learn the flow. There is a difference in the electricity. The electricity is higher here."

How did the rookie rate his performance?

"I'm satisfied," Bosworth said. "I know I have to work to get things down. But I knew the calls and didn't feel lost out there. It's time to stop thinking so much and do more reacting.

"The team didn't play well and that's disappointing. We need to work and get ourselves together. Now that I've played and got in there, it's time to get down to business."