Complex sentence: In July 2011, in response to the ongoing NCAA investigation, Ohio State vacated all wins from the 2010 season, including the win over Michigan, leaving Tressel with a final record against Michigan of 8--1, with a win streak of six.
Split into simpler sentences: In July 2011, in response to the ongoing NCAA investigation, Ohio State vacated all wins from the 2010 season, including the win over Michigan. If the vacated wins are not counted, Tressel's record versus Michigan stands at 8--1, with a win streak of six.