The 22nd-seeded Wildcats and freshman signal-caller Lowell Narcisse now get to host No. 6 Sterlington in the second round of the Class 2A bracket.
"Lowell's really had a good season," Jenkins said. "He's just starting to scratch the surface of his ability. He played all season despite being injured (lower back and hip).
"He really grew so quickly that his muscles stay tight. His toughness - refusing to come out of the games - forced him to develop as a passer more than just an athlete playing quarterback, and that's going help down the road with making him a better pocket passer."
Jenkins, who took over the Saint James program after serving as offensive coordinator at Lutcher, continued to praise Narcisse, the younger brother of one of the most-celebrated and decorated Wildcats of all-time: LB Juarelle "Joe" Narcisse, who sparked St. James to a district championship ahead of John Curtis Christian during his senior season (went on to play at McNeese State).
"Lowell's still growing with the potential to be 6-foot-5 and 220 pounds," his coach said. "He's had a lot of success in basketball, and I think he's got the world in the palm of his hand as a football player.
"He's a really good quarterback prospect for college. He has great understanding for a freshman with making the right reads and handling the offense."
Jenkins already is making comparisons to Lutcher QBs Blaine Gauthier (Cajuns) and Ruston Matherne.
"He had 1,200 yards passing with 15 TDs and only four interceptions with two regular season games left," said Jenkins, whose team split that pair of contests before pounding its first playoff foe.
"Lowell can be as good as he wants to be. He gets some of that toughness from his family."
The frosh threw for six scores and ran for another in his team's final regular season game, a 51-6 thumping of Cohen.
He threw for three touchdowns and ran for three more last Friday to lift the Wildcats to a playoff win on the road.
Saint James didn't win a game in either 2011 and 2012.