Complex sentence: A professional competitor since 2003, Horwich has also fought in BAMMA, Strikeforce, Bellator and in the UFC, and for the Seattle Tiger Sharks of the IFL where he was the IFL Middleweight Champion.
Split into simpler sentences: A professional competitor since 2003, Horwich has also fought in BAMMA, Strikeforce, Bellator and in the UFC. Horwich also competed for the Seattle Tiger Sharks of the IFL where he was the IFL Middleweight Champion.