Florida State (50-16) will play Arizona on Thursday, needing to beat the Wildcats twice to reach the championship round.
No. 2 seed UCLA (48-16) was knocked out a day after No. 1 Florida was eliminated from the opposite bracket.
Sitz (4-3) had not made it through five innings in six of his previous seven outings. The junior held the Bruins to two singles through five innings and struck out the side in the sixth after UCLA loaded the bases.
UCLA starter Zack Weiss (3-3) was pulled after getting just one out. Bases-loaded walks in the opening inning produced the Seminoles’ first two runs.
Before the game, Florida State coach Mike Martin suspended infielder John Holland indefinitely after the freshman was arrested on suspicion of shoplifting at an Omaha sporting goods store.
Holland was the Seminoles’ designated hitter in their first two CWS games. The infielder was batting .243 for the season and appeared in 41 games, 16 as a starter.
Holland went before a judge Tuesday and paid a $50 fine. City prosecutor Martin Conboy said the case is closed.
Martin said Holland “made a serious error in judgment.” The coach said the university would have no further comment.
Conboy said he was uncertain whether the incident occurred at the Scheels store in west Omaha or the Scheels’ vendor tent across the street from TD Ameritrade Park.
Conboy said security personnel spotted the 19-year-old Holland and his 23-year-old brother Steven about 4:20 p.m. Monday changing the price tag on merchandise. Conboy said the two attempted to purchase $32 athletic shorts with a price tag that had been attached to a $19.99 clearance item.
The men were booked for shoplifting and released after posting bond. The pair pleaded guilty Tuesday to destruction of property, Conboy said.