Texas coach Steve Sarkisian said he won’t decide until Friday whether Quinn Ewers or Arch Manning will quarterback the nation’s No. 1 team on Saturday against Mississippi State.Ewers left the Longhorns’ Week 3 win over UTSA with an abdominal strain and was replaced by Manning. The redshirt freshman started in Ewers’ place last weekend in a 51-3 drubbing of Louisiana-Monroe as Texas moved to 4-0.Sarkisian told reporters Thursday that he wants Ewers, in his third season as the Longhorns starter, to have the maximum time to recover before naming his QB.”We’re going to decide on the quarterback thing (Friday),” Sarkisian said. “It won’t be a secret. We’re not trying to pull the wool over anybody’s eyes. Just want to give Quinn every opportunity to see if he’s ready to play and what he looks like. I’d say he’s improved every day. I think Arch has had a very good week.”In his first college start, Manning was 15-of-29 passing for 258 yards with two touchdowns and two interceptions against ULM. In relief of Ewers in the UTSA game, Manning completed 9 of 12 passes for 223 yards with four TD passes and 67-yard touchdown run.