(Houston) -- Bill O'Brien has been introduced as the third coach in Houston Texans history.

Less than two years after replacing Joe Paterno as coach at Penn State, the 44-year-old O'Brien has returned to the NFL. He was an offensive assistant under Bill Belichick at New England from 2007-12.

He was introduced today, taking over for Gary Kubiak, who was fired with three games left in Houston's NFL-worst 2-14 season.

O'Brien was 15-9 at Penn State, hit hard by NCAA sanctions levied for the Jerry Sandusky child sex abuse scandal that cost the late Paterno his job.