Arnis Vecvagars spent most of his career playing in LBL with ASK/Brocēni/LMT, BK Ventspils and ASK Riga as the most notable teams.
[1] For couple of seasons he went abroad playing for Austrian team UKJ SÜBA St. Pölten and Polish side Ericsson Bobry.
Vecvagars made his head coaching debut in 2012 with BA Turība of Latvian Basketball League.
[4] On 27 September, Vecvagars was named the new head coach of the Latvian National Team.
[6] In October 2022, A. Vecvagars was appointed head coach of the Valmiera Glass Via, a club in the Latvian National Basketball League (LBL2).