Complex sentence: "Big Klu" enjoyed his most productive years from through, with home run totals of 40,49,47 and 35 while driving in over 100 baserunners in each, including a league-leading 141 RBIs in.
Split into simpler sentences: Big Klu enjoyed his most productive years from through, with home run totals of 40,49,47 and 35. He also drove in over 100 base runners each year in that four-year span, including a league-leading 141 RBIs in.