After the 2012-13 season, Mejeris went to the United States for NBA pre-draft workouts,[1] and although going undrafted, he performed well and earned feedback of being "two years from being NBA-ready".
Mid-season, he was loaned to Ford Burgos, helping the team to win the LEB Gold playoffs and earn promotion to Liga ACB.
[5] In May 2017, Mejeris guided VEF to one more domestic championship, getting named Latvian League playoffs MVP once again.
[7] On March 9, 2022, he signed with Victoria Libertas Pesaro of the Italian Lega Basket Serie A (LBA).
Mejeris was a significant member of the team that reached the Basketball Champions League finals, doing anything the coach requested, and always with a positive attitude.