Josh Harvey report..(To watch in HD, change the 360 to 1080HD)
Rex Burkhead added 75 yards and a touchdown as the Cornhuskers won their 26th consecutive opener, the longest streak in the nation.
Martinez scored on runs of 7, 43 and 47 yards and completed 11 of 22 passes for 116 yards before giving way to Brion Carnes in the fourth quarter.
The Mocs of the Football Championship Subdivision scored their only points when Marlon Anthony caught a 13-yard pass from B.J. Coleman after cornerback Andrew Green fell.
The Huskers' new system under first-year offensive coordinator Tim Beck revealed lots of triple-option plays and quick short passes.
Old-school Nebraska fans surely loved Beck's first call of the game. Tyler Legate's 1-yard run marked the first time a fullback had carried the ball for Nebraska since 2004.
There's no doubt, however, that this offense is built around Martinez's strengths as a runner.
Martinez, who matched his career high with 19 carries, showed no signs of the toe and ankle injuries that slowed him the second half of last season. His touchdown runs were his first in nine games, since he had a career-high four against Kansas State. It was the fourth time in his 14 career games that he had at least three TD runs.
Burkhead set up the Huskers' first touchdown by turning a pitch from Martinez into a career-long 52-yard run. Martinez scored on the next play.
Martinez's next touchdown looked a lot like others scored by Nebraska's option quarterbacks of yesteryear. With Legate trailing to his left, Martinez cut around the left corner and turned around Chattanooga's Kadeem Wise on his way to a 43-yard run that put Nebraska up 20-0.
Martinez extended the lead to 40-7 in the third quarter when he faked a handoff and ran 47 yards untouched.
The offense did have some rough patches. Martinez dropped a snap, made a bad pitch under pressure and had Burkhead bump into him from behind as he set up to pass. Seven of the Huskers' 41 first-half plays went for negative yards.
The Huskers showed they have a capable replacement for Alex Henery, the most accurate kicker in NCAA history.
The Mocs scored their only points on the first series of the second half, with Marlon Anthony catching a 13-yard TD pass from B.J. Coleman after cornerback Andrew Green fell.
Chattanooga couldn't get much else going against a defense that has allowed under 11 points a game at home since 2009.
Coleman was 19 of 33 for 174 yards, with one interception.
The Huskers sacked Coleman three times. Their biggest defensive play came when the Mocs were backed up against their goal line and Cameron Meredith intercepted a pass that Jared Crick tipped at the line. The play set up Burkhead's touchdown.
Nebraska was the next in a line of major powers to play Chattanooga. The Mocs lost to the last two national champions, 62-24 at Auburn last year and 45-0 at Auburn in 2009, and 57-2 in 2008 against BCS runner-up Oklahoma.