Grishin did not appear in the 2010–2011 and 2011–2012 World Cup races. He also did not appear in the World Ski Championships in 2011. He re-joined for the 2012–2013 World Cup but failed to finish higher than fifth place in seven races. He finished in 15th place in the aerials standing. In the following year's World Cup, he had two third-place finishes. After five races, he finished fourth in the discipline standings. He also competed in the 2013 World Ski Championships. He finished 13th and did not qualify for the finals.