Head coach Greg Scott said Sequoyah made 32 of 43 shots at the free-throw line, compared with the Colonels' 9-of-17 performance.
"We feel like we outplayed them everywhere but at the free-throw line, but obviously we were killed by the mountain of foul shots called," Scott said.
He said three Colonels -- Sam Taylor, Jozelle Payne and Trey Walker -- fouled out on the evening and that made the task even more challenging.
Cass (11-7, 4-4 in Region 7-AAAA) broke out on top against the Chiefs, grabbing a 24-9 lead at the end of the first quarter. Sequoyah, however, started whittling away at the lead in the second period, outscoring the visitors 26-19, closing the score to 43-35 at the break.
The Chiefs narrowly outpointed Cass in the third period, 15-12, and was on the low end of the 55-50 score at the end of the third quarter.
Sequoyah caught and then passed Cass late in the final period.
"Out of 26 points in the fourth quarter, Sequoyah scored only three field goals," Scott said. "The rest they got at the free-throw line."
The coach said he is proud of how Cass performed."I love how we kept our composure. We could have hung our heads but we never gave in."
Scott said Sequoyah is a challenge.
"They're a good team and there's a reason they are ranked No. 2 in the state," he said, "but if we play like we did tonight, we won't lose another game. We just have to play this way against teams that are not No. 2 in the state."
Scoring for Cass were Taylor, 7; Tarris Batiste, 9; Jay Stephens, 12; Tony Mitchell, 8; Kadeem Sutton, 13; Payne, 7; and Walker, 14.
Cass next plays Friday, when it hosts cross-county rival Woodland.