Kafka worked out for the Cowboys on Thursday, as did wide receivers Braylon Bell and Maurice Williams, who spent time in the Arena Football League in 2013.
The Cowboys made a waiver claim on Kafka last June after he was cut by the New England Patriots, but because the Jacksonville Jaguars had priority in the waiver process, he went there. A fourth-round pick of the Philadelphia Eagles in 2010, Kafka was out of football last year after he was cut by the Jaguars.
The Cowboys have two quarterbacks under contract for 2014: starter Tony Romo, whose recovery from back surgery is on schedule, and backup Kyle Orton, who could be caught in a salary-cap purge or might be asked to restructure.
Bell went to high school in Dallas, graduating from South Oak Cliff H.S., and played at Abilene Christian University. Williams spent time with the Indianapolis Colts last summer.