Answer based on context:

Hoping to rebound from their home loss to the Jaguars, the Broncos flew to the RCA Dome for an intraconference fight with the defending-Super Bowl champions, the Indianapolis Colts.  In the first quarter, Denver galloped to an early lead with kicker Jason Elam getting a 35-yard field goal, along with QB Jay Cutler (Indiana native) complete a 7-yard TD pass to WR Brandon Marshall.  In the second quarter, the Colts responded with RB Joseph Addai got a 14-yard TD run.  The Broncos replied with Elam kicking a 22-yard field goal, yet Indianapolis took the lead with QB Peyton Manning completing a 9-yard TD pass to TE Dallas Clark. In the third quarter, Denver began to struggle as Manning got a 1-yard TD run, along with completing a 3-yard TD pass to Clark.  The Broncos got close with Cutler getting a 2-yard TD run.  However, in the fourth quarter, the Colts sealed their win with Manning completing a 5-yard TD pass to WR Reggie Wayne, along with kicker Adam Vinatieri nailing a 22-yard field goal.

How many rushing touchdowns were made by quarterbacks?
2