Roberts achieved the best mark ever for an NCAA Division II athlete when he won the NCAA DII Indoor title with a put of – a mark which ranked him second among American collegians that season. He was only third at the NCAA outdoor meet. He made his national debut at the 2010 USA Outdoor Track and Field Championships, taking 15th place. He also made his international debut and won a gold medal at the 2010 NACAC Under-23 Championships in Athletics. He retained his NCAA indoor title the following year, but failed to record a valid mark at the outdoor meet. He threw over twenty metres for the first time at the beginning of 2011 and his mark of ranked him in the top ten nationally that year.