Bluffton-Harrison won three out of four at Northfield in middle school basketball Thursday night. The eighth grade boys won 34-20 and improved to 9-6 on the season. Gavin Grieser was the top-scorer with 13 points, followed by Rafe Gerber (8), Dawson Lee and Bennett Stoller (3), Gibby Grieser, Parker Banres and Cooper Jenkins (2) and…