sentences:  In 2003 with the Double-A Frisco RoughRiders, he hit .347 and was selected as Baseball America 2nd Team Minor League All-Star, Texas League All-Star Second Baseman and Texas League Minor League Player of the Year.He also played for the World team in the All-Star Futures Game.Nivar made his Major League debut on July 30, 2003 for the Rangers against the Boston Red Sox as a ninth inning defensive replacement.