Complex sentence: Once in March of 2000, with an upset against Boothbay 58-45, and again in March of 2013, against BoothBay with a score of 61-54.
Split into simpler sentences: Once in March of 2000, with an upset against Boothbay 58-45. And then again in March of 2013, against BoothBay with a score of 61-54.