Hoping to rebound from their loss to the Jaguars the Raiders played in home ground for an AFC West rivalry rematch against the Broncos. The Raiders took the lead with Jacoby Ford running 71&#160;yards for a touchdown. The Broncos replied as Tim Tebow scrambled 40&#160;yards for a touchdown. The Raiders trailed as Tebow made a 33-yard TD pass to WR Brandon Lloyd. They soon responded by RB Michael Bush got a 1-yard TD run. The Broncos lead again with kicker Steven Hauschka making a 46-yard field goal, but the Raiders pulled ahead as kicker Sebastian Janikowski nailed a 49 and a 35-yard field goal. The Broncos re-tied the game after Hauschka made a 35-yard field goal, but the Raiders got the lead back with Janikowski nailing a 47-yard field goal, followed by QB Jason Campbell completing a 73-yard TD pass to FB Marcel Reece. The lead was narrowed when Hauschka nailed a 45-yard field goal, but the Raiders pulled away with OLB Quentin Groves tackling RB Correll Buckhalter in the endzone for a safety, followed by Bush getting a 1-yard TD run.
Question: How many touchdowns were scored by runs?
Answer: 4