If the Bills do a simple restructure of Shelton's $3 million salary, the trade basically is cap neutral because both players are in the top 51
Henry cap number: $1.35 million ($1.25 million salary + $100,000 proration)
Shelton's cap number: $3 million each of the next 4 yrs
Shelton's minumum salary for his NFL experiece is $665,000
Convert $2.335 million ($3 million - $665,000) to signing bonus. It gets prorated over 4 yrs at $583,375/yr. Shelton's 2005 cap number is now $665,000 + $583,375 = $1,248,750
Cap savings from Henry: $1.25 million
Cap hit for Shelton: $1,248,750
Bills save $1,250 on cap