 Complete the following phrase:  He set an indoor best of 46.23 seconds over 400 m in January 2011 and was fifth in that event at the NCAA Indoor Championships. He ran a time of 49.43 for third at the Pac-10 Championships and improved one position at the NCAA Outdoors, taking second place in a seasons best of 49.08 seconds. The 2012 collegiate season saw Morton develop his skills further. He ran a near-personal record 48.95 to win the Pac-10 title and also came second in the 110-meter hurdles. He went undefeated in the 400 m hurdles for Stanford that year and won the NCAA title with a best of 48.79 seconds. Morton discussed his internationally eligibility with both the Athletics Federation of Nigeria and USA Track and Field. He requested to run for the United States and American officials asked for his release from Nigerian duty, but ultimately he continued to represent Nigeria. At the 