[1] The next season, he became the youngest player ever to debut in the strongest Lithuanian basketball league, the LKL.
[2] In 2010, he played for BC 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.
Šeškus played for 1+1⁄2 seasons for Lietuvos Rytas Vilnius before returning to BC Perlas on a loan in January 2015.
[3] In the 2014–15 season, Šeškus's averages in EuroCup and LKL totaled about 3 points per game.
Edvinas is the son of Virginijus Šeškus, a longtime BC Prienai coach.