Complex sentence: As of 2010, he had horses in training with trainers such as Julio Canani, Richard Mandella, and Bill Mott, and also by that time he had campaigned for twenty five horses who had won stakes.
Split into simpler sentences: As of 2010, he had horses in training with trainers such as Julio Canani, Richard Mandella, and Bill Mott. Also by that time Hubbard had campaigned for twenty five horses who had won stakes.