Posted by ESPN.com's Bill Williamson
Curtis spent his first three seasons in Dallas. He has 11 career catches in 36 games. He was also a special-teams contributor. Curtis was signed as an undrafted free agent in 2005 by Dallas and he was on the Cowboys' practice squad that season.
Kansas City coach Todd Haley was on Dallas' staff then. Earlier this week, Kansas City signed tight end Sean Ryan, who was also in Dallas with Haley.
Meanwhile, Kansas City center Rudy Niswanger signed his restricted free-agent tender.