Marijonas PetraviÃÂius (born October 24, 1979) is a Lithuanian retired professional basketball player. He was a member of the Lithuania national team. He mainly played the center position, but he could also play the power forward position.
With his former club Mitteldeutscher BC, he won the FIBA EuroCup Challenge in 2004, being the Final Four MVP.
PetraviÃÂius arrived to Lietuvos rytas Vilnius in 2006, to replace Robertas Javtokas who left the team, and he quickly became the first choice center for the team. He helped Lietuvos rytas to reach the EuroCup final in 2007. In 2008 the team was competing in the EuroLeague, and in his first game PetraviÃÂius scored 29 points against Armani Jeans Milano.
PetraviÃÂius led Rytas to first place during the group stage, but during a practice PetraviÃÂius suffered a foot injury. With the club's three leaders injured: himself, Matthew Nielsen and Roberts à  telmahers, Rytas failed to enter the EuroLeague quarterfinals. He was named the EuroCup Finals MVP in 2009.
He joined the Italian club Armani Jeans Milano in 2009.
In August 2011, he agreed to terms with the Turkish team Beà Âiktaà  Cola Turka Istanbul. However, Beà Âiktaà  gave up on signing him after he was diagnosed with a lung problem. Later he signed a contract with Azovmash Mariupol, however he asked to wait one month for personal reasons. Azovmash declined to wait one month for him and terminated the contract.
On 16 January 2012 PetraviÃÂius signed with Khimki Moscow Region. He debuted in Khimki on 28 January 2012. He played only 5 minutes and scored 2 points, grabbed 1 rebound and made one assist, but he also made two turnovers and got one foul. However, this was his first and the last one game in Khimki, because his disease renewed. On 17 February 2012 Khimki terminated contract with PetraviÃÂius.
|- | style="text-align:left;"| 2007âÂÂ08 | style="text-align:left;"| Rytas | 17 || 16 || 25.1 || style="background:#CFECEC;"|.722* || || .741 || 5.6 || .3 || .6 || .4 || 13.5 || 15.7 |- | style="text-align:left;"| 2009âÂÂ10 | style="text-align:left;" rowspan="2"| Milano | 8 || 4 || 18.5 || .617 || || .756 || 3.3 || .6 || .4 || .3 || 9.1 || 10.4 |- | style="text-align:left;"| 2010âÂÂ11 | 5 || 4 || 15.4 || .630 || || .700 || 3.2 || || .4 || || 8.2 || 6.8 |- class="sortbottom" | style="text-align:center;" colspan=2 | Career | 30 || 24 || 21.7 || .699 || .000 || .743 || 4.6 || .3 || .5 || .3 || 11.4 || 12.8
PetraviÃÂius was a member of the senior Lithuanian national basketball team at the 2008 Summer Olympics tournament, where Lithuania finished in 4th place. He also participated in EuroBasket 2009 and EuroBasket 2011. During the latter tournament, however, he was forced to leave the team due to being diagnosed with a pulmonary embolism.