Complex sentence: Mohammed left Tunisia and came to the United States in 2009 and, after spending some time playing in local amateur leagues, including turning out for the L.A. Blues, he joined the Hollywood United Hitmen of USL Premier Development League in 2010.
Split into simpler sentences: Mohammed left Tunisia and came to the United States in 2009. After spending some time playing in local amateur leagues, including a period playing for the L.A. Blues, he joined the Hollywood United Hitmen of USL Premier Development League in 2010.