Lake Forest College Softball  News & Notes April 5, 1999  Contact:  Scott Rucker, SID  For Immediate Release  SISKA NAMED '99 SEASON'S FIRST PLAYER OF THE WEEK      Lake Forest's Karen Siska, a first baseman from Evergreen Park, IL (Mother McAuley High School), has been named the Midwest Conference South Division Player of the Week.  This is the MWC's first selection of the 1999 season and covers the entire season to date.  Siska is the only senior on this year's Forester softball team.  She appeared in 15 of the Foresters' first 16 games and collected 19 hits in 50 at bats for a .380 batting average.  Siska also added eight RBIs, three doubles and a team-high nine runs scored, while striking out just twice.  During last week's double-header sweep of Beloit, Siska had five hits and four RBIs.  One of her hits was a two-out game-tying RBI single in the bottom of the seventh inning of the first game.       The MWC Sports Information Directors select the conference players of the week.