Blue (lower body) spent time in the injury tent Thursday before walking off the field under his own power, Joe Hoyt of The Dallas Morning News reports.
Blue took a big hit during 11-on-11 work and appears to now have ended Thursday's practice early, which leaves his availability uncertain for Saturday's preseason opener against the Rams. The rookie fifth-round pick has recently earned practice opportunities with the first-team offense and is competing for standing in an uncertain Cowboys backfield, where veterans Javonte Williams and Miles Sanders represent his primary competition for touches.