The Broncos would have seven days to match any offer sheet Marshall signs. If Denver opted not to, the Broncos would receive the sixth overall pick in the April NFL draft.
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The Seahawks have several reasons for showing interest in Marshall beyond his potenial production.
The Seahawks have two first-round picks, including the 14th overall pick they acquired from Denver last April.
And Seattle's offensive coordinator is Jeremy Bates, who worked with Marshall in Denver; the Seahawks' receivers coach is Jedd Fisch, who also worked with Marshall.
Seattle lost free agent receiver Nate Burleson to the Detroit Lions on Friday and needs to find a replacement.
And the Seahawks' other receivers are aging -- T.J. Houshmandzadeh is 32 years old and Deion Branch turns 31 in July.
Marshall turns 26 later this month. He has had three straight seasons with more than 100 catches.
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