Career
Kupšas played for Lietkabelis in the 2012-2013 season and averaged 10.5 points, 5.5 rebounds and 0.8 blocks per 21 minutes of game action. He went undrafted at the 2013 National Basketball Association Draft. On 6 August it was announced that for the 2014-2015 season Kupšas will be loaned to the Estonian team British Columbia Kalev/Cramo.