Kansas City, Mo. ? Two offensive linemen with suspensions in their past and a Pro Bowl quarterback carefully coming back from a severe concussion all joined the Kansas City Chiefs at practice on Wednesday.

None will play against Seattle on Sunday.

Trent Green was throwing the ball around like a kid on a playground, obviously happy to take another step on his recovery from a Sept. 10 concussion. He did not take part in team activities.

“He just threw the ball around the ball yard. That’s all,” said coach Herm Edwards. “Like a kid who’ll throw the ball around the ball yard to anybody who’ll catch it. He did some individual drills. He wasn’t involved in any team situations, just throwing the ball.”

The Chiefs said Green would continue to progress slowly back into action. It’s not thought that he will be ready to play for at least another two weeks, and possibly more.

Tackle John Welbourn, suspended for six games for violating the NFL substance policy, declined to speak with reporters after he rejoined the Chiefs for the first time. Welbourn, who started nine games at right tackle for Kansas City last year, will practice as backup left tackle, Edwards said. He has a two-week exemption when he will not count against the 53-man roster while the Chiefs decide whether to keep him. Edwards said Welbourn had obviously kept himself in good condition.

Offensive tackle Chris Terry, who most recently was with the Seahawks, signed a two-year free-agent deal. Terry started 23 games and one postseason contest for the Seahawks from 2002-04 after entering the league as a second-round draft choice with Carolina in 1999.

He was released by the Seahawks in March 2005. He served a four-game suspension during the 2003 season for violating the NFL’s substance abuse and personal conduct policies. He also missed several games in 2004 with a shoulder injury.

Terry said he had been visiting with another team but thought the Chiefs were a better fit.

“They just called me and I came in,” Terry said. “I just must be meant to be here.

“I am anxious to get going. My goal is to just leave everything behind you and get started and play ball, one step at a time,” he said. “I’m going to study as hard as I can and try to learn as fast as I can. I feel a little rusty.”

The Chiefs all sounded delighted to have Welbourn back. He was a popular, hard-working member of the team even after serving a four-game suspension for violating league drug policy in 2005.