2006-07: Playing in 65 games for the NTDP U-17 team, Czarnik finished second on the team in goals (19) and fourth on the team in points (30).
2007-08: Czarnik played in 57 games for the NTDP U-18 team and finished third on the team in points with 39 (19 goals, 20 assists). Czarnik was a key part of Team USA winning the 2008 U-18 Five Nations tournament by scoring once and contributing two assists in four games. Czarnik also played well at the 2008 IIHF World U-18 Hockey Championships by tallying eight points (three goals, five assists) in seven games. He is currently ranked 88th overall by NHL Central Scouting.
2008-09: Posted respectable point totals in 38 games on a somewhat young and rebuilding Michigan Wolverine team. As a former member of the NTDP, Czarnik received attention from the Team USA for the U-20 World Juniors Championship, having tried out for the squad but not making the team.
2009-10: Left U of Michigan 12 games into the season and joined the Plymouth Whalers of the OHL where he posted 17 goals and 32 assists in 43 games.
2010-11: Czarnik tied teammate Stefan Noesen (OTT) for the Plymouth Whalers' scoring lead as a 20-year old in his first full OHL season. Czarnik scored 33 goals with 34 assists and was +4 with 46 PMs in 61 games as Plymouth finished third in its division and advanced to the second round of the OHL playoffs. Czarnik scored 4 goals with 5 assists and was -5 with 6 PMs in 11 playoff games.
2011-12: Signed to a three-year entry level contract by the Kings in October 2011, Czarnik made the jump from junior hockey to the AHL – skating in 49 games for Los Angeles AHL affiliate Manchester. Playing primarily a lower line slot, his role steadily grew as the season went on. He finished the year with 8 goals and 15 assists and was plus-seven with 32 penalty minutes. He scored 3 of his 8 goals on the Monarchs' power play. Manchester finished second in the Atlantic Division and lost to Norfolk three games to one in a first round playoff series. Czarnik scored 2 goals and was plus-one with 2 penalties in the Norfolk series.
Czarnik is a talented offensive player who still has a lot of room to develop as a hockey player. He has good vision on the ice and a solid shot. A developing two-way forward.