The Texas Rangers are pulling every lever possible to try and win games. But it’s not working and it’s something fans should start worrying about. After Thursday's 9-2 loss to the New York Yankees, the Rangers head back home with a 2-4 record on the six-game road trip. The Rangers (17-20) have now lost each of their last four series — two at home and two on the road. Coming into Globe Life Field on Friday is the Chicago Cubs, who have won nine straight games and 15 straight games at Wrigley Field. An optimistic Rangers fan would seed that as an advantage. But the Rangers’ offense has been worse at home than on the road and Texas 7-8 at home. Texas’ two series victories at home — a sweep of Seattle and two out of three against Pittsburgh — feel like aberrations and not trends. Texas is further below .500 than it has been all season and only 1.5 games back of the AL West lead. But it feels worse. Here are three reasons why Rangers fans should be concerned.…