Complex sentence: McCreary began boxing at the age of 10 held an amateur record of 87-15 (46 KO's) and won the Title National Championship in 2009 and 2010.
Split into simpler sentences: McCreary began boxing at the age of 10 and held an amateur record of 87-15 (46 KO's). He won the Title National Championship in 2009 and 2010.