The Texas Rangers know they have their work cut out for themselves if they want to wrestle the AL West title away from the defending division champion Oakland Athletics. And the Los Angeles Angels aren't making it any easier for them. Garrett Richards pitched seven effective innings, and the Angels parlayed three errors and another mammoth home run by Mark Trumbo into five early runs against Derek Holland to beat Texas 8-3 Saturday night. The Rangers' fifth loss in six games, coupled with Oakland's 2-1 victory against Houston, put them 1½ games behind the Athletics with 21 remaining.