SEATTLE (AP) - Koren Robinson is back with the Seahawks, one week after getting passed over. And Keary Colbert is headed from Denver to Seattle in a trade as the Seahawks took two more steps to replenish their decimated receiving corps.

Seattle agreed to a one-year contract with Robinson, its former No. 1 draft choice, on Tuesday afternoon. Agent Alvin Keels confirmed the agreement and its length in an e-mail to The Associated Press.

Colbert's agent, Gary Uberstine, said Tuesday afternoon in an e-mail to The AP his client also is coming to Seattle. Fox Sports.com first reported the trade. The Broncos are believed to be getting a fifth-round pick from the Seahawks.

Seattle (0-2) has lost six players to injury at that position already this season, meaning Robinson and Colbert are likely to play Sunday against St. Louis (0-2).

Robinson could start. The free agent, who played for Green Bay last season, started 52 games for Seattle from 2001-04. Coach Mike Holmgren values Robinson because he already knows his offense - unlike some of the players Seattle has recently tried at the position.

Last week, while signing free agents Billy McMullen and the since-waived Samie Parker, Holmgren said he'd welcome back Robinson, whose past troubles with alcohol led to his release from the Seahawks in 2005. But team executives apparently nixed that idea - until their situation at wide receiver became even more desperate.

Logan Payne started last weekend's loss to San Francisco but sustained a knee injury. He is the third wide receiver to be out for the season. Backup quarterback Seneca Wallace, pressing into receiver duty, pulled his calf and will miss up to a month.