The Philly crowd gave its biggest pop of the night to Forrest and unleashed its biggest boos (and that's saying something) on Anderson.
Griffin looked much bigger than Silva as new referee Kevin Mulhall briefed the fighters.
Griffin came out and missed with a head kick. Silva caught a leg kick and threw Griffin spinning. With three minutes left, Silva tagged Griffin and dropped him. Silva bobbed and weaved with his hands at his waist and then dropped Griffing with one punch. Griffin charged into a final punch and was finished.
It was an off hand jab that finished the fight.
Griffin ran out of the cage. Joe Rogan called it the most embarrassing defeat of Griffin's career.
Silva came into the fight off two underwhelming title defenses against Thales Leites and Patrick Cote.
For Griffin the fight was his return to the Octagon in his first fight since losing his light heavyweight belt to Rashad Evans at UFC 92.