Complex sentence: Saupold pitched for Erie in 2014 and 2015, receiving a promotion to the Toledo Mud Hens of the Triple-A International League during the 2015 season.
Split into simpler sentences: Saupold pitched for Erie in 2014 and 2015. During the 2015 season, he received a promotion to the Toledo Mud Hens of the Triple-A International League during the 2015 season.