Kotut ran on the 2013–14 Spanish cross country circuit and won at the Cross de Venta de Baños and the Cross Zornotza. He also set a best for the 10K run of 28:17 minutes to win the We Run Rome race. He fared poorly in the first half of 2014, recording a slow half marathon of 69:05 minutes and failing to finish at the 2014 London Marathon. A return to Philadelphia saw him repeat both his time and his placing, beaten by world medallist Bedan Karoki Muchiri this time. A further improvement at the Delhi Half Marathon at 59:12 minutes for fourth place saw him ranked sixth in the world. He competed sparingly in 2015, but still performed to a high standard, with runner-up finishes at the CPC Loop Den Haag and Milan Marathon (2:08:55 hours).