Florida State improved to 16-1 in conference tournament games since 2014, with the only loss coming in the 2016 final against Clemson.
It's the seventh time the Beavers have been granted a home regional.
Cofer had a minimal role for the Seminoles in his junior campaign but bounced back as a senior to become an integral part of Florida State's first trip to the Elite Eight since 1993.
UNC (38-18), the No. 6 national seed and ACC regular-season champions, opens the Chapel Hill Regional with a 7 p.m. game against No. 4 seed North Carolina A&T (MEAC Tournament champions).
Butch Thompson felt good about Auburn's chances to host an NCAA Regional at Plainsman Park before the start of the SEC Tournament. "I'm excited. Not only are we getting back a great player but his leadership qualities will be what we need for this team and where we are now".
The Seminoles not only won their second straight ACC tourney title, but their third in four years. FSU is now 7-1 this season in extra-inning games. The others were Mendoza, pitcher Drew Parrish and DH Jackson Lueck.
They committed three errors - two by Mann, the second baseman - leading to four unearned runs for Florida State.
Mann's two-run homer in the third pulled the Cardinals to 5-3, and he led off the fifth with a double.
The Tigers and the Seminoles went five scoreless innings, until the Seminoles hit two home runs to take an 8-5 lead in the top of the 11th. Logan Wyatt added two singles, one RBI and one run scored and finished 5-for-12 with four walks and three RBIs in the ACC Championship. The sites of super regionals are determined based on regional results, but top eight seeds, which will be determined on Monday, will host super regional should they advance out of their regional.
The Tigers were not selected as one of 16 teams to host a Regional next weekend in the 2018 NCAA Baseball Tournament.