Hand has been ruled out for the rest of Sunday's game against the Steelers due to a knee injury, Tori McElhaney of the Falcons' official site reports.
It's not clear when Hand sustained the injury, but it's severe enough for him to not return to Sunday's contest. Maason Smith is the lone depth option left on the defensive line behind starters LaCale London, Gervon Dexter and Brandon Dorlus.