The Falcons signed Armstrong (undisclosed) to the practice squad Monday, Josh Kendall of The Athletic reports.
Armstrong was previously placed on Atlanta's IR due to an undisclosed injury in mid-August before being let go with an injury settlement. The fifth-year cornerback did not play in 2021 after he was similarly waived with an injury settlement from Houston's IR last September, and he has played only 136 defensive snaps during his career.