[1] He came to prominence in 2014 when he represented Russia at the 2014 IPC Athletics European Championships in Swansea.

In the shot put he threw a distance of 9.02, more than a metre more than his nearest rival to secure his first international gold medal.

He followed this with a victory in the club throw, where he threw 35.94 to better his own world record he had set four months earlier.

[2] In the run up to the Summer Paralympics in Rio Frolov competed at the 2016 IPC Athletics European Championships in Grosseto.

He successfully defended his shot put title, but suffered his first major international defeat in the club throw, where despite recording a personal best of 36.13, he was beaten into second place by a new world record thrown by Poland's Maciej Sochal.