Complex sentence: The Seattle Mariners lose their star shortstop Rodriguez to free agency in 2001 and enjoy massive success the following year, winning a record number of games while the Texas Rangers failed to significantly improve despite the addition of Rodriguez and his impressive statistics.
Split into simpler sentences: The Seattle Mariners lost their star shortstop Alex Rodriguez to free agency in 2001 and the following season won a record number of games. The Texas Rangers failed to signifigantly improve despite the addition of A-Rod and his impressive statistics.