Mathies went the first seven for Loogootee and settled down after first, allowing Rivet just three hits and no runs over his final six innings on the hill.
In all, Mathies surrendered seven hits and fanned two while walking one before giving way to Horney in the eighth.
Allen likewise left the mound after seven innings, allowing six hits and striking out six while walking four before Wirth relieved him to start the eighth inning.
Rivet started quickly against Mathies and the Lions. Singles by Gavin Benock, Cummings, and Thomas coupled with a double by Chase Allen and Lion errors by Alex Frye and Trevor Resler keyed a three-run first for the Patriots.
But after being shut down by Allen through three frames, the Lions rebounded in the fourth and knotted the game at 3-3.
Casey Miller, Branden Wilz, and Resler each singled for the Lions in the inning, and Loogootee benefited by a trio of walks issued by Allen to Mathies, Connor Wittmer, and Frye.
Bailey talked fondly of his five seniors - Waylon Mathews, Will Nonte, Horney, Frye, and Wittmer.
“Those guys are responsible for much of what this program has accomplished since I’ve been around it,” Bailey said. “I love those guys, they’re all good quality players, they’re good quality men. They’re all going to do well.”
Rivet faces Shoals in Monday’s second semifinal at 12:30 p.m.. Barr-Reeve and North Daviess meet in the first semifinal at 10 a.m. Winners from those two games then decide the sectional champion beginning at 7 p.m.
Vincennes Rivet 300 000 002 - 5 9 2
Loogootee 000 300 001 - 4 7 4
Mathies, Horney (8) and Mathews. C. Allen, Wirth (8) and Benock. WP: Wirth.
LP: Horney 2B: VR; C. Allen.