It's a rematch of last year's American League division series.
   Boston clinched home-field advantage throughout the postseason with Oakland's loss. The AL West champion A's will play their playoff opener at home next Friday against AL Central champion Detroit. AL East winner Boston will start at Fenway Park against the team emerging from the wild-card playoff: Cleveland, Tampa Bay or Texas.
   Oakland lost to Detroit in last year's division series.
   "It was a good matchup last year, we've had some spirited games with them this year, so it should be an exciting series," Oakland manager Bob Melvin said.