Baldwin was expected to be a game-time decision for Monday night's game against the Packers. He "banged" the shoulder during practice, according to coach Pete Carroll. Baldwin was Seattle's leading receiver a year ago, but had just three catches through two weeks.
With Baldwin out, Charly Martin is expected to get time as Seattle's inside receiver.
Jennings missed Green Bay's 23-10 win over Chicago with his groin injury. He got progressively better during the week of practice and was listed as questionable on Saturday's final injury report. Jennings had five catches for 34 yards in the season opener against San Francisco.