Here's an explanation provided by Clarion Ledger.
Morgan William watches end of Mississippi State's loss
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Vic Schaefer said the decision to leave William on the bench came down to reserve guard Jazzmun Holmes playing well at the time, and William not playing particularly sharp.
William, a junior, scored eight points on 2 of 6 shooting from the field. She had four assists and one turnover, but never got into a rhythm on either end of the floor in 23 minutes.
“Jazz played good today. Morgan, she had some struggles early,” Schaefer said. “Again, y'all, it's a long, hard grind of a year, of a season. We got in so late Friday night. We've been trying to almost play catch-up since then.”
Schaefer suggested that William may have lacked the energy she played with in Mississippi State’s thrilling upset over UConn on Friday night.
“I thought we had a couple kids today that just didn't quite have the energy level that we needed,” Schaefer said. “When you combine that with their energy level seemed to be really good, I think that made for a bad recipe for our not being able to handle dribble-penetration.”