Florida State outfielder Jahni Kerr’s defensive plays in the second inning of the Seminoles’ 3-2 comeback win over Chattanooga might have summarized Friday’s NCAA Regional opener for FSU. The redshirt junior made a retreating catch at the wall in right field for the second out of the inning, then a diving catch to end the frame. Those plays kept the game scoreless at the time, and they were pivotal in helping Florida State overcome a 2-0 deficit. “It might have been a rocky start, but in the end I caught the ball,” Kerr said. “I think that was just mindset — maybe it’s rocky in the beginning, …