 He sacked quarterback Blaine Gabbert for a one-yard loss in the fourth quarter.On December 16, 2012, Bethea made five solo tackles and sacked quarterback Matt Schaub in the Colts' 29–17 loss at the Houston Texans in Week 15.He finished the season with 100 combined tackles (75 solo), seven passes defensed, and a career-high two sacks in 16 games and 16 starts.