The Cardinals placed Dobson (hamstring) on injured reserve Saturday, Darren Urban of the team's official site reports.
After missing the first three outings of the preseason, Dobson totaled 39 offensive snaps across the Cardinals' final two exhibitions, yet he gathered in just one of five passes for 13 yards. He also hasn't recorded a catch since the 2015 season, so him sticking around the Arizona desert is a bit of a shock.