NFL flexes Steelers-Ravens matchup to Sunday Night Football - ESPN
NFL announces Week 17 flex game to 'SNF'
2015 NFL schedule: Arizona Cardinals back to Sunday Night Football, NBC flexes game vs. Eagles to prime time - Revenge of the Birds
Steelers-Ravens game flexed to 'Sunday Night Football' in Week 17
Mark your calendars 🗓 - Sunday Night Football on NBC
Ravens Have Three Primetime Games, But None vs. Steelers
NFL flexes Chiefs-Chargers to 'SNF' in Week 11
NBC's Sunday Night Football schedule released
SNF' Week 17: AFC North rivals clash with playoff implications
NBC announces Sunday Night Football schedule