Career
He mainly plays the shooting guard position. He is 194 cm (6" 4") tall and weighs 80 kg (176 lbs). A 13-year-old Šeškus started his career with British Columbia Rūdupis of the NKL in 2008, scoring four points and grabbing a rebound against British Columbia Alytus.
The next season, he became the youngest player to debut in the strongest Lithuanian basketball league, the LKL. He recorded 2 turnovers against British Columbia Perlas.
In 2010, he played for British Columbia Perlas-MRU and then transferred to Šarūnas Marčiulionis Basketball Academy, both times struggling to establish himself as the leader in the NKL, but dominating in the MKL league, averaging about 23 points in 30 minutes of playing time while representing the Academy in his age group. He played for Vilniaus Sakalai during the 2012-2013 season.
Šeškus played for one-and-half seasons for Lietuvos Rytas Vilnius before returning to British Columbia Perlas on a loan in January 2015. In the 2014-2015 season, Šeškus averages in EuroCup and LKL totaled about 3 points a game.