Kimmons finished fourth in the 60 meters at the 2010 IAAF World Indoor Championships with 6.59 seconds. At the 2010 USA Outdoor Track and Field Championships, he won a silver medal behind Walter Dix. At the 2010 Weltklasse Zürich meeting, he ran a new personal best of 9.95 seconds over 100 metres, becoming the 72nd person to break the 10-second barrier.