The Patriots (14-4) fell to host Biloxi before beating Gautier later Thursday.
Incumbent starter Will Rogers will have to earn his starting spot over several signal-callers, including former Southern Miss QB Jack Abraham.
The Bulldogs will face the Billikens on Saturday in Frisco, Texas.
After sweep at Ole Miss, Mississippi State softball welcomes No. 5 Florida for first home SEC series
The Bulldogs are 0-3 in conference play after a sweep at Ole Miss.
The Bulldogs had just two hits against Rebels pitcher Anna Borgen.
The Patriots beat Buckhorn (Alabama) on Friday night but fell to Booneville High School on Saturday.
‘It’s all love’: California roots grow friendly rivalry between Mississippi State softball and Ole Miss
Mississippi State outfielder Chloe Malau’ulu is at the center of a connection between 16 Bulldogs and Rebels who hail from the Golden State.
Starkville High School has three players competing, Columbus High School has two, and New Hope High School has one.
Three runs in the top of the seventh made the difference as the Trojans withstood a late comeback.
Carter won four state championships in his 19 years at Starkville, going all the way in 2010, 2015, 2019 and 2020.