Small was 6 of 9 for 146 yards for the Tigers, coming off a 37-35 victory over Southwestern Athletic Conference rival Prairie View in their opener last week.
Porter also had a 53-yard scoring run in the first quarter. He finished with 80 yards rushing on seven carries after running for 128 yards against Prairie View.
Jay Christope also threw a touchdown pass for Texas Southern and scored on a 52-yard run.
Texas College also was routed last week in its opener, falling 44-6 to Bellhaven.