Wilson threw three touchdowns to Baldwin, including an 80-yard catch-and-run score with 2:01 left after Pittsburgh had trimmed Seattle's lead to 32-30.
Baldwin caught a crossing route on third-and-10 at the 20, broke two tackles and raced for the clinching score. Baldwin caught a 30-yard TD midway through the fourth quarter after Pittsburgh had taken a 27-26 lead.
Wilson also threw two touchdowns to Jermaine Kearse and Seattle (6-5) picked up a huge victory in its hopes of getting back to the postseason.
Copyright 2015 by The Associated Press