The Cowboys are expected to sign 2006 draft pick Pat McQuistan after a Friday morning workout at Valley Ranch.
McQuistan, who played in Dallas from 2006-09, has spent the last two years in Miami and New Orleans. He was an unrestricted free agent this offseason.
To make room on the 90-man roster, the Cowboys waived rookie free agent Taylor Dever, an offensive tackle from Notre Dame.
The Cowboys don't have much experience at the backup tackle spots behind starters Doug Free and Tyron Smith. While Jermey Parnell has been here for two years, he barely has any game experience at offensive tackle, although he served as the swing tackle all last year.
After Parnell and now McQuistan, the Cowboys have three undrafted rookie free agents at offensive tackle in Levy Adcock (Oklahoma State), Tyrone Novikoff (Idaho) and Jeff Adams (Columbia).
The thought of adding a veteran such as McQuistan is to give the offense a better look in the preseason games. In the past, the Cowboys have struggled on the offensive line in the exhibition, leaving it difficult to evaluate the offense, particularly the quarterback and running backs.
McQuistan was a seventh-round pick (211th overall) in 2006, Bill Parcells' final year with the Cowboys. He played 40 games in Dallas, but never started. His eight career starts all came in Miami during the 2010 season when he joined a coaching staff filled with former Cowboys assistants, including then-Dolphins head coach Tony Sparano.