 Ryasensky made his senior debut in the Russian Superleague with Ak Bars Kazan before transferring to Neftekhimik Nizhnekamsk for the inaugural season of the KHL in 2008-09 season.Over the next six seasons Ryasensky spent time also with HC CSKA Moscow and SKA Saint Petersburg.In the 2014–15 season, Ryasensky was traded by SKA Saint Petersburg along with Alexei Grishin and Mikhail Tikhonov in a return to Neftekhimik Nizhnekamsk in exchange for Nikolai Belov and a first-round pick on November 24, 2014.