Complex sentence: Also during that time he also began a career in security as a bouncer at various nightclubs in the Coconut Grove and South Beach areas, but now dedicates his time solely to furthering his MMA career.
Split into simpler sentences: Also during that time he began a career in security as a bouncer at various nightclubs in the Coconut Grove and South Beach areas. Now he dedicates his time solely to furthering his MMA career.