 Complete the following phrase:  DeShasier began to compete at senior national level in 2008. She threw a personal record of 53.74 m in Edwardsville that July and came close to that mark to take fifth place overall at the United States Olympic Trials. She improved in both placing and performance at the 2009 USA Outdoor Track and Field Championships, coming fourth with a new best mark of 55.08 m. She had a similar peak the following year, as her throw of 55.53 m at the 