Baker didn't practice Wednesday due to a rib injury, Darren Urban of the Cardinals' official site reports.
Baker is coming off a season-high 13 tackles this past Sunday against the Colts, a contest in which he also notched his first sack of the campaign. He's just nine tackles shy of a fourth straight year with triple digits, but a health concern may be threatening his ability to play. Fortunately for the safety, Baker has two more sessions to get on a path to active status Sunday in Dallas.