HUNTSVILLE – Caleb Cotton hit a go-ahead RBI single in the bottom of the sixth and the Sam Houston bullpen put up four scoreless innings as the Bearkats closed out a sweep of Middle Tennessee with a 3-2 win on Sunday at Don Sanders Stadium. It was the first weekend sweep of Conference USA play for the Bearkats (24-16. 7-8 CUSA) and the first time in league play that Middle Tennessee (13-26, 4-11 CUSA) has been swept. Cotton finished with a pair of hits for the day and was one of five Kats with multi-hit days. He was the only…