Aljay Davis hit a three-run double during a six-run fifth inning and Greg Bachman went 3 for 4 and drove in two runs Saturday as the Fort Worth Cats routed the McAllen Thunder 15-3 in the first game of a doubleheader at La Grave Field.In the second game, Fort Worth took advantage of an error to score two unearned runs in the fourth, and T.J. Bosman and Chad Robinson combined on a four-hitter in a 2-1 victory to complete the sweep. The Cats have won four straight. The Cats also took advantage of five errors in the first game and scored in every inning but the first, when they trailed 1-0.Cats starter Arron Wilkerson (2-1) didn’t let the offense take all the credit. He went the distance, giving up three runs on five hits and four walks. He struck out six.