Bowman suffered an Achilles injury during Friday's walkthrough and won't play Sunday against the Saints, Tori McElhaney of the Falcons' official site reports.
Head coach Raheem Morris said Bowman's injury "is not good," which may be hinting at an extensive absence to come, but for now, Bowman has been ruled out only through Sunday's game. Mike Ford could be in line to take over as Atlanta's nickel cornerback.