question: Who was the defensive coordinator for the Broncos in 2015?
sentence: Osweiler was injured, however, leading to Manning's return during the Week 17 regular season finale, where the Broncos were losing 13–7 against the 4–11 San Diego Chargers, resulting in Manning re-claiming the starting quarterback position for the playoffs by leading the team to a key 27–20 win that enabled the team to clinch the number one overall AFC seed.