Complex sentence: The stadium was opened prior to the 1997 college softball season and played host to four NCAA Regionals in 1999,2000,2001, and 2006 and hosted the 2008 SEC Softball Tournament.
Split into simpler sentences: The stadium was opened prior to the 1997 college softball season. Since then, it has played host to four NCAA Regional's, 1999,2000,2001, and 2006 and hosted the 2008 SEC Softball Tournament.