The 23-year-old Fontaine has spent parts of the last three seasons with the team’s AHL affiliate in Hartford, scoring 21 goals and 26 assists in 133 AHL games. After scoring 26 points in 72 games with the Wolf Pack in 2018-19, a shoulder injury limited Fontaine to just 13 games in 2019-20.
Fontaine was a sixth-round pick in the 2016 NHL Draft.
Raddysh, 24, finished his first full season in Hartford in 2019-20 after being acquired by the Rangers at the 2019 trade deadline. He collected 28 points in 62 games with Hartford and was second on the Wolf Pack in scoring among defensemen.