Colts offensive coordinator Bruce Arians was hospitalized on Sunday morning with an inner ear infection and will not coach or call plays on Sunday versus the Ravens.
The Colts stress that Arians is "fine," but it's certainly a big loss for the Indianapolis offense. Quarterbacks coach Clyde Christensen will call the plays on offense, but there's not expected to be a noticeable difference. On a separate note, Arians has been linked to head-coaching jobs with the Chargers and Bears this week.
Source: Mike Chappell on Twitter