Results from XFO 42 at the Sears Centre in Hoffman Estates, IL on December 10, 2011. Live results also available by following Chicago’s MMA Twitter. Main Event Miodrag Petkovich def. Mike Marrello via unanimous decision Co-Main Event Danny Aguirre def. Jake Grigson tap via armbar, 2:19 of rd. 2 Pro Bouts Kevin Knabjian def. Brandon...