The Kansas City Chiefs have already done a ton to improve their offense since free agency opened up on Tuesday. First they signed bruising running back Peyton Hillis and now they signed Kevin Boss.

The tight end made a name for himself with the Giants, but spent the 2011 season as a member of the Oakland Raiders.

The Kansas City Chiefs have reached an agreement with former Raiders and Giants tight end Kevin Boss on a three-year, $9 million contract, a league source told ESPN NFL Insider Adam Schefter.

Boss signed a $16 million, four-year contract last summer to replace Pro Bowl tight end Zach Miller, but wasn’t utilized much in former coach Hue Jackson’s offense.