Fraser appeared in five games with the Blackhawks last season. The 23-year-old also had 17 goals and 41 points in 75 games with the Rockford IceHogs of the AHL.
The 25-year-old Johnson spent last season with the New York Islanders and had two assists in 30 games. Columbus originally picked the 6-foot-2, 211-pound Johnson in the third round of the 2001 NHL Entry Draft.
The 6-foot-2, 210-pound Janik has 15 points in a seven-year professional career. The 28-year-old spent five years in the Buffalo Sabres organization, then two seasons with the Tampa Bay Lightning.
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