Czarnik has skated in two games with Boston in 2016-17 - his first two career NHL games - and recorded two penalty minutes.
He appeared in 68 games with Providence in 2015-16, tallying 20 goals and 41 assists for 61 points with a plus-17 rating. The 5'9", 167-pound forward ranked 7th in the AHL in points and 11th in assists in his rookie season with the P-Bruins.
Prior to joining Providence, Czarnik finished up his senior season at Miami University (Ohio) in 2014-15, appearing in 40 games while registering nine goals (tied for fifth on the team) and 36 assists (led the team) for 45 points (led the team) with a plus-five rating. The forward led the Redhawks the previous three seasons (2012-14) in both assists and points.
At the collegiate level with the Redhawks, the 23-year-old competed in 159 games and racked up 46 goals and 123 assists for 169 points (1.06 points per game average). Czarnik was named a Hobey Baker finalist in 2012-13 and served as team captain for his junior and senior campaigns.
The Washington, Michigan native signed an entry-level contract with the Bruins on April 1, 2015.