Complex sentence: Additionally, pitcher Derrick Ellison signed with the Richmond Roosters of the Frontier League in 2001, he has gone on to pitch for the Seattle Mariners, Chicago Cubs, Milwaukee Brewers and New York Mets organizations.
Split into simpler sentences: Additionally, pitcher Derrick Ellison signed with the Richmond Roosters of the Frontier League in 2001. He has gone on to pitch for the Seattle Mariners, Chicago Cubs, Milwaukee Brewers and New York Mets organizations.