I assumed they were keeping him in because their pen is relatively weak. I thought about our game vs. Jackson state last year in the regional and I recall wondering "why don't they take their starting pitcher out?". Then they FINALLY took him out and I understood why (remember that bloodbath?). Obviously TXST's relievers were not THAT bad but based on the numbers my guess is they were playing for the W tonight. They must know that beating Baranik will be a monumental task.
Just my humble opinion