Sandberg, 22, recorded 25 points (8 goals, 17 assists) and a plus-17 rating in 52 games with HV71 of the Swedish Hockey League in 2016-17. He finished the campaign ranked 6th on the team in points, 3rd in assists, 5th in hits (44), and 3rd amongst team forwards in blocked shots (24). Sandberg finished the playoffs ranked T-3rd in the league in points (14), T-5th in goals (6) and T-6th in assists (8). He led his team in postseason points and assists en route to the SHL Championship.
In 204 career SHL games with HV71, Sandberg posted 71 points (25 goals, 46 assists) and a plus-8 rating. He helped his junior team win the championship two straight seasons (2013, 2014) and was named the U20 league "Best Forward" in 2013.
The five-foot-nine, 180-pound native of Stockholm, Sweden has represented his country at numerous international tournaments, including the World Jr. Championships (2013, 2014), helping Sweden capture the silver medals both years.