TIFFIN — The Heidelberg University Softball team emerged victorious in a Dems Day doubleheader at Frann’s Field, taking two from John Carroll University. Gabbie Stallbaum hit a walk-off single to win the opener, 3-2, then HU’s Caitlin Dems outdueled her little sister, JCU’s Kristin Dems, in the nightcap, 5-1. Heidelberg improved to 12-24 overall and 5-9 in the OAC. GAME ONE: BERG 3-5-1 JCU 2-7-2 The Blue Streaks scored one in the top of the first, but ‘Berg starter Jessica Voitko did a good job to mitigate the damage. HU answered with an unearned run in the bottom of the…