Miller got off to a quick start in his second season, registering 10 sacks in nine games. In this period, he recorded 30 quarterback hurries, more than he had during his entire 2011 campaign. Thanks to this tremendous start, he was considered an MVP candidate. On November 16, he was fined $21,000 for a hit on Carolina Panthers quarterback Cam Newton in Week 10. He received his second career AFC Defensive Player of the Week honor after recording three sacks and two forced fumbles against the San Diego Chargers the following week. For his efforts during the month of November, he was awarded AFC Defensive Player of the Month. On December 26, 2012, he was announced the starting Outside Linebacker in the AFC division for the 2013 Pro Bowl. Miller finished the season third in sacks with eighteen and a half, breaking a Denver Broncos record of seventeen previously held by Elvis Dumervil. He also capped off the 2012 season finishing second in voting for Defensive Player of the Year and being named first-team All-Pro. In the Divisional Round of the playoffs, Miller had nine total tackles and two quarterback hits in the 38–35 2OT loss to the Baltimore Ravens.