Michigan Bicycle Racing Association - http://www.mbra.org/indexx.php
There is a calendar of events and a list of racing teams.
FYI - many racing teams recruit and close their rosters in the fall for logistical reasons. (ordering team kits, training riders, etc.), so it may be difficult to find a team for this season, but it will be an opportunity to scope out different teams. Don't feel shy about approaching riders at races and asking about their team.