[5] In 2019–20, Tubelis split playing time between Perlas and Rytas' senior team, emerging as one of the top players in the NKL.

[6] At ANGT Kaunas in February 2020, he averaged 20.5 points and 12.5 rebounds, leading Rytas' U18 team to first place and earning tournament most valuable player honors.

[7] Later that month, Tubelis participated in the Basketball Without Borders Global Camp at 2020 NBA All-Star Weekend in Chicago.

[20] On 8 November, he re-signed with Rytas Vilnius and then was loaned to Neptūnas Klaipėda of the Lithuanian Basketball League (LKL).

[21] On 14 May 2024, Tubelis received the LKL Most Valuable Player Award after averaging 17.5 points, 7 rebounds and 1.1 blocks during the regular season.

[24] Tubelis represented Lithuania at the 2019 FIBA U18 European Championship in Volos, averaging 14.9 points, 12.6 rebounds and 3.4 blocks per game.

[25] Tubelis has a twin brother, Tautvilas, who also currently plays basketball for the Arizona Wildcats and has represented Lithuania at the international level.