Vanderbilt Baseball entered Friday’s series opener with a golden opportunity to build off the momentum of three straight wins and boost its RPI and postseason outlook with a victory against Texas. With Connor Fennell on the mound, it was likely the Commodores’ best chance to steal a game from  D1 Baseball’s  No. 4 team in the country.   Instead, Tim Corbin’s squad was embarssed in front of a sold-out crowd on Friday night, falling 11-4 in the opener.   Fennell’s Margin for Error Runs Out  After retiring six of the first eight batters he faced, Fennell surrendered a solo home run to Aiden Robbins over the high wall in left field. From there, things quickly unraveled for the fiery right-hander, who’s been a much-needed steady presence for a depleted Commodore pitching staff this season. Three innings later, the New Hampshire…