Arenas' agent, Hadley Engelhard, told Rapoport that he's pleased with the deal: "This is a trade where, based on Kansas City's acquisitions at the cornerback position, we were actively pursuing. With the trade made, we're happy it's to the Arizona Cardinals."
The 2011 fifth-round pick figures as a lead blocker for Chiefs running back Jamaal Charles, but that's a skill set still in progress for Sherman. ProFootballFocus graded Sherman 19th out of 25 fullbacks as a road grader in 2012.
Sherman barely is a presence as a runner or pass catcher, with just three career yards on the ground and 13 receptions for 111 yards over two seasons. He joins a roster already crowded with three other fullbacks -- Patrick DiMarco, Ryan D'Imperio and Braden Wilson -- on the depth chart.
Rapoport noted that Chiefs general manager John Dorsey prefers taller corners, meaning Arenas -- at just 5-foot-9 -- was not a fit. Arenas figures in the slot, but he's unlikely to use his return skills with Patrick Peterson and rookie Tyrann Mathieu in-house.
Arenas is entering the final year of his contract, but no extension is included as part of the trade, Rapoport said.
Follow Marc Sessler on Twitter @MarcSesslerNFL.