In addition to the two Mosjøen teams, 116 other teams from 6 different countries played in Boys 16 - born 2003 - 11 aside. They were divided into 29 different groups, whereof Mosjøen IL 1 could be found in Group 6 together with Vestsiden-Askøy IL 2, KFUM-Kam. Oslo and Eid IL.

Mosjøen IL 1 made it to Playoff B after reaching 3:rd place in Group 6. Once in the playoff they made it all the way to the Final, but lost it against Korsvoll IL with 0-2. Thereby Mosjøen IL 1 finished second in B16 Playoff B during Norway Cup 2019.