First, the Bearkats stopped the Roadrunners streak of sets victories at 36 by winning the first set 25-19. UTSA had not lost a set in its 12 consecutive Southland Conference wins.
Then Sam Houston won two of the next four sets to hand UTSA its first Southland match loss in a 25-19 25-20 21-25 16-25 15-13 thriller that lasted two hours and 11 minutes.
Kolbe totaled 18 hits with only five errors in 57 attempts. Kendall Cleveland added 15 kills as Sam Houston upped its season record to 14-12 and now stand 8-5 in Southland action.
Whitney Walls led the Roadrunners with 19 kills and McKenzie Adams added 16 as UTSA dropped to 18-9 for the year and 12-1 in league action.
The loss was the first for UTSA since the Roadrunners fell to the eighth-ranked University of Texas Longhorns in three sets on Sept. 17. However, the Runners stand 0-4 for the season in five-set matches.
The Bearkats shocked UTSA with almost error-free play in the first two sets, committing only 12 errors in 89 attempts the first two stanza.
Sam Houston looked ready to win in three with the score tied 20-20 in the third set. But UTSA took five of the next six points to force a fourth set. In the fourth, the two teams were tied four times with three lead changes. But the Runners took control at 12-10 and won 13 of the next 19 points to force a fifth.
Entering tonight's match with a 2-1 record in three sets, the Bearkats quickly took control and never trailed. On match point at 14-13, Leigh Larralde committed a service error and the Kats had their upset.
Setter Kym Loving assisted on 35 of the Bearkats' 46 kills and added seven digs. Libero Jamie Haas was credited with 29 digs and Kolbe added 15.
Kolbe and Haley Neisler led a Kat front line that totaled 13 blocks. Neisler had a hand in nine and Kolde was credited with four.
Sam Houston's final home match will be played against Texas A&M-Corpus Christi Saturday afternoon at 2 p.m. The Bearkats' four seniors will be honored in a special pre-match "Senior Day" ceremony.