The Rob Sims trade wasn't the only Seahawks-Lions transaction Monday.
Henderson played the "bandit" defensive end position -- combination linebacker and defensive end -- at Southern Mississippi. The Seahawks' defense is expected to incorporate similar elements under the "elephant" moniker. That might help explain some of the appeal, although that requires some reading between the lines.
Seattle owns two seventh-round choices, but only one of them -- No. 213 overall -- can be traded. The other seventh-rounder was a compensatory selection.