Olivia Dunne rocked up to the Great American Ball Park on Wednesday, September 24, to support Pittsburgh Pirates ace Paul Skenes in his final start of the season. The former LSU gymnast has been a regular presence at MLB ballparks this year, cheering on both the Pirates and her boyfriend.That same day, Dunne shared her game-day look on Instagram, pairing a chic white top with denim jeans as she rooted for Skenes from the stands."LFG," Dunne captioned her story, tagging the Pirates ace.Screenshot via Olivia Dunne's Instagram (@livvydunne)Before taking the mound on Wednesday night, Skenes and Dunne, who met during their time at LSU, played chess. Dunne shared a glimpse of their game on Instagram.Screenshot via Olivia Dunne's Instagram (@livvydunne)Paul Skenes makes history against Reds with girlfriend Olivia Dunne in the standsSkenes has played at a high level, but the Pirates have failed to capitalize on their ace's historic season. Making his last start of the season, the pro baseball pitcher was up against the Reds' Hunter Greene.The duo was involved in an intense battle from the mound, both going scoreless in the first three innings. However, the Pirates got the better of Greene in the fourth and sixth innings to score two runs.Meanwhile, Paul Skenes shut out the Reds over six innings, allowing four hits and striking out seven hitters. His scoreless outing etched his name in the history books as the two-time All-Star became the first Pirates pitcher to finish the regular season with an ERA under 2.00.The Pirates ace is the first pitcher to reach the milestone since Justin Verlander in 2022. Skenes is one of 51 pitchers to post a sub-2.00 ERA since 1920. His league-best 1.97 ERA further solidifies his case for a maiden NL Cy Young award.