Up next for the U.S. in Thursday's semifinals will be the winner of tonight's game between Spain and Russia.
The game turned ugly after Matt LaPorta ran into Chinese catcher Wang Wei while scoring on a Taylor Teagarden double in the fifth.
This year, Maddux is 6-9 with a 3.99 earned run average, but has given up just four runs over 19 total innings in his past three starts.
Shawn Johnson won the gold medal and good friend Nastia Liukin silver on the balance beam.
The world's top ranked performer had enough points to top Lithuania's Gintare Volungeviciute.
Orton has thrown for 2,347 yards with 12 touchdowns and 15 interceptions in his career.
Kerri Walsh and Misty May-Treanor have advanced to the gold medal match in beach volleyball, where they will have a chance to defend their 2004 title.
Brenda Villa scored three goals to lead the U.S. to a 9-8 victory over Australia.
Henry Cejudo captured the top medal with a victory over Japan's Tomohiro Matsunaga.
The former head coach of the U.S. National Team has become the new head coach and general manager of the Los Angeles Galaxy.