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Follow along for the Devils additions and subtractions throughout the summer.
Devils Group 2 Free Agents:Brandon Baddock, Will Butcher, Connor Carrick, Josh Jacobs, Mirco Mueller, Pavel Zacha
Devils Group 3 Free Agents:Kenny Agostino, Eric Gryba, Egor Yakovlev, Eddie Lack, John Ramage, Drew Stafford, Eric Tangradi
Devils Group 6 Free Agents:Kurtis Gabriel, Nick Lappin, Blake Pietila
Devils Unrestricted Free Agents (Not Qualified):Cameron Johnson, Ryan Murphy, Stefan Noesen

ADDITIONS
SUBTRACTIONS
CONTRACTS EXPIRING IN 2020:
Taylor Hall
Wayne Simmonds
Nico Hischier
John Hayden
Jesper Bratt
Kevin Rooney
Andy Greene
Sami Vatanen
Mackenzie Blackwood
CONTRACTS EXPIRING IN 2021:
Travis Zajac
Kyle Palmieri
Blake Coleman
CONTRACTS EXPIRING IN 2022:
Miles Wood
P.K. Subban
Cory Schneider
CONTRACTS EXPIRING IN 2023:
Damon Severson
Here is some more info on the types of free agents and compensation (from the NHL):
FREE AGENTS SUBJECT TO COMPENSATION AND RIGHT TO MATCH - GROUP 2
The players listed below have been tendered a qualifying offer by their respective Clubs and are subject to draft-choice compensation and right to match. The draft choice compensation scale is based on compensation offered by the new Club:
OFFER COMPENSATION
$1,395,053 or below None
Over $1,395,053 to $2,113,716 Third-round choice
Over $2,113,716 to $4,227,437 Second-round choice
Over $4,227,437 to $6,341,152 First-round and third-round choice
Over $6,341,152 to $8,454,871 First-round, second-round and third-round choice
Over $8,454,871 to $10,568,589 Two first-round choices, one second- and one third-round choice
Over $10,568,589 Four first-round choices
Devils Subject to Compensation and Right to Match:Brandon Baddock, Will Butcher, Connor Carrick, Josh Jacobs, Mirco Mueller, Pavel Zacha
UNRESTRICTED FREE AGENTS - GROUP 3
The following players have qualified for Group 3 Free Agency (age 27 or older or with at least seven Accrued Seasons) and are Unrestricted Free Agents.
Devils Group 3 Free Agents:Kenny Agostino, Eric Gryba, Egor Yakovlev, Eddie Lack, John Ramage, Drew Stafford, Eric Tangradi
UNRESTRICTED FREE AGENTS - GROUP 6
The following players qualify for unrestricted free agency, having met the requirements for Group 6 free agency. This group is defined as players whose contracts have expired, are age 25 or older, have completed three or more professional seasons, and (i) in the case of a player other than a goaltender, have played fewer than 80 NHL games (regular-season and playoff), or (ii) in the case of a goaltender, have played fewer than 28 NHL games (regular-season and playoff). Please note that these amounts are subject to pro-rating due to the 48-game season in 2012-13.
Devils Group 6 Free Agents:Kurtis Gabriel, Nick Lappin, Blake Pietila
UNRESTRICTED FREE AGENTS
The following players were not tendered a qualifying offer and are therefore Unrestricted Free Agents not subject to a right to match or draft choice compensation.
Devils Unrestricted Free Agents (Not Qualified): Cameron Johnson, Ryan Murphy, Stefan Noesen