Career
He also represents the internationally. Europe
In the 2010-2011 season, he played for Olin Edirne Basketbol where he has become one of the leaders of Olin, averaging 18.6 ppg, 3.5 rpg, 4.5 apg and 1.6 spg. On 12 June 2011, Seibutis signed a three-year (2+1) contract with the Lithuanian team Lietuvos rytas.
In July 2014, he signed a contract with Turkish team Darüşşafaka & Doğuş.
On 4 September 2015, Seibutis signed a one-year contract (with an option for another) with the Lithuanian powerhouse Žalgiris Kaunas. National Basketball Association
Seibutis was drafted in the second round with the 50th overall pick of the 2007 National Basketball Association draft by the Dallas Mavericks.
Following the draft selection, he played with the Mavericks" National Basketball Association Summer League team in Las Vegas, averaging 6 points, 1 rebound, 1.6 assists, while shooting over 47% in 13 minutes per game over 5 games. He played again in 2008, averaging only 2 points in 10.8 minutes per game over 5 games.
He was ultimately dropped from the 2008 roster because of his underperforming.
He also participated in his first Summer Olympics in 2012.