Indianapolis Colts rookie running back Donald Brown has been ruled out for Sunday's game against the Tennessee Titans with a chest injury. Defensive end Dwight Freeney is questionable with an abdominal injury despite participating fully in practice for two days in a row.. The Colts also ruled out defensive tackle Kenyuta Dawson (knee), defensive back Aaron Francisco (ankle), receiver Anthony Gonzalez (knee) and kicker Adam Vinatieri (knee). Source: National Football Post