Sark is 1-4 vs Top 10 teams (at Texas). Sark's record vs Top 10 teams in his stops at Washington & USC was 1-5, with the win coming when he was at Washington vs #3 USC. Career wise vs Top 10 ranked teams he's 2-9.
Sark's record vs Top 10's at Texas:
2021: vs #6 Oklahoma - L by 7 points
2022: vs #1 Alabama - L by 1 point (probably should've won that one)
2022: vs #4 TCU - L by 7 points
2023: @ #3 Alabama - W by 10 points
2023: vs #2 Washington - L by 6 points
That win on the road vs Bama was huge and really a turning point for him and that program. Before that Sark was a pretty mediocre coach at Washington & USC, but he seems to have turned a corner as a coach at Texas.