Standing at 6 ft 4 in (1.93 m) tall and weighing 187 pounds (85 kg), he plays as a point guard.

He played one season for youth team, which were competing in NKL, and became the champion of the league.

[1] Janavičius won two silver medals while representing the Lithuanian youth squad in the 2006 FIBA Europe Under-18 Championship and the 2008 FIBA Europe Under-20 Championship.

In 2014, coach Jonas Kazlauskas included Janavičius in the preliminary 24-player squad for the main Lithuania national basketball team,[2] though he failed to compete for the spot in the national team's roster due to a broken palm.

[4] He did not make the EuroBasket 2015 roster either during his second try, when Lukas Lekavičius was taken instead of him less than a week before the championship began.