Complex sentence: On January 11,2016, Oh signed a one-year contract with the St. Louis Cardinals of Major League Baseball (MLB), with a club option for a second season, who had scouted him for seven years while he pitched in Asia.
Split into simpler sentences: On January 11,2016, Oh signed a one-year contract with the St. Louis Cardinals of Major League Baseball (MLB), with a club option for a second season. The Cardinals had scouted him for seven years while he pitched in Asia.