National Football Post reports that Bob Sanders has an elbow injury:

Colts safety Bob Sanders has a new injury to add to his growing collection. Sanders, who underwent offseason knee surgery and made his first appearance of the year against the San Francisco 49ers, was sidelined at practice today due to an elbow injury. Also missing time today: defensive end Dwight Freeney (non-injury related, wide receiver Anthony Gonzalez (knee), cornerback Kelvin Hayden (knee), kicker Adam Vinatieri (knee) and cornerback Marlin Jackson (knee).