Four Milwaukee Brewers could be headed to arbitration if some last-minute maneuvering isn’t done.  Closer Corey Knebel, starting pitcher Jimmy Nelson, second baseman Jonathan Villar and utility player Hernan Perez all made the league minimum, or pretty close to it, last year — so they’re due some big paydays.  Knebel and Nelson can expect something close to four-million dollars when the numbers are crunched.  The players always come out well in this process, even when the team’s offer is chosen.  Hearings before an arbitration panel will be held next month.