The 2000 -2003 Rangers had a young slugger named Alex Rodriguez who averaged 52 homeruns in those three years. Those teams also had Juan Gonzalez, Mark Teixiera, Ivan Rodriguez, and Hank Blaylock.
Those teams also averaged more than 90 loses per year. Why? Because the Rangers invested in offense. They traded away pitching prospects like John Danks, Chris Young, and Armmando Galerraga.
When did the Rangers turn things around? When they started focusing on pitching.