Having developed his skills on Alita Alytus’ youth teams, he makes his debut in Lithuania’s first division (LKL) during the 1996/1997 season. At the age of only seventeen, he immediately becomes one of international basketball’s most interesting prospects. Alita club offers Lavrinovic solid experience between 1996 and 1999 (even Korac Cup participation) – enough to peek the interest of NBA pros. He signs a pre-contract with the Toronto Raptors, but a window of opportunity opens with the NEBL (Northern European Basketball League) and is sought after by Russian clubs.
In 2002, Lavrinovic moves to Perm, signing on for two years with Ural Great - a decisive move for his professional career. The player’s value increases exponentially between 2002 and 2004 thanks to the Russian Cup victory in 2004 added to his brilliant stats first in the ULEB Cup and then in the FIBA Europe League. These undoubtedly afforded him another excellent opportunity for professional growth.
This time he’s called by Cska Moscow, who then turns him over to the emerging and ambitious Dynamo Moscow team for the entire 2004/2005 season. Missing the national title by an inch, he returns to capture everyone’s attention with a performance that leaves its mark on the ULEB Cup. All of which earn him a spot at a club with great prospects in Russia’s Superleague and in international competitions, Unics Kazan. He signs with them in the summer of 2005.
In 2006/2007, his team makes the Russian Superleague finals and the ULEB Cup semifinals. His numbers make him the championship’s third best blocker and he finishes the international competition with 11.6ppg and 7.0 rpg. He comes to Montepaschi for the 2007/2008 season, where he wins the Supercoppa Italiana and the National Title and takes third place in Euroleague’s Final Four in Madrid. He finished the national championship in the number one spot for average points scored per minutes played as well as for index ranking per minutes played. As for Euroleague, he earns a spot on the second All-Team starting five. The following season, once again the Lithuanian forward/center was one of the green-and-whites’ most influential players. They win the Supercoppa Italiana, the Coppa Italia and the National Title to achieve a 2008/2009 grand slam. The 2009/2010 season commences with a Supercoppa win, followed by a Coppa Italia win, the club’s second ever, and the 2009/2010 National Title victory, accomplishing a second Italian slam. In October of 2010, the new season's first trophy arrives with the Supercoppa, followed by the third Coppa Italia in a row, where he’s named MVP, and the National Title. He’s one of the stars of Montepaschi’s European seasons and Montepaschi flies to the Final Four in Barcelona, where he was named to the Second Euroleague All Star Team for the second time. The 2011/2012 season starts off with the win of the Italian Supercup. He was named Mvp of the match.