Seattle followed the same rules for the draft as the
Vegas Golden Knights in the
2017 NHL expansion draft, with the provision that Vegas was exempt from losing a player, a deal made between the team and the league in 2016, in exchange for forgoing a share of the Kraken's expansion fee. The 30 other teams submitted their lists of protected players on July 18. Teams could protect eight skaters and a
goaltender, or seven
forwards, three
defensemen, and a goaltender; and they had to expose at least two forwards and one defenseman who were under contract for the
2021–22 season and had played in at least 27 games in the 2020–21 season, or more than 54 games in the
2019–20 and
2020–21 seasons combined. Teams also had to expose a goaltender under contract for the 2021–22 season or who would be a
restricted free agent (with a
qualifying offer received) in 2021. Teams were required to protect any contracted players with
no-move clauses (NMCs) with one of the team's slots for protected players, unless: • The contract expired on July 28, 2021, in which case the NMC was considered void for the draft. • The player had an NMC continuing past July 28, 2021, was deemed to have a career-threatening injury, and was thus declared exempt from selection and use of a protection slot. • The player with an NMC waived his no-movement clause for the expansion draft. Any player picked in the expansion draft could not have his contract bought out until after the completion of the 2021–22 season. At least twenty of the thirty players selected by Seattle had to be under contract for the 2021–22 season, and the team was required to select a minimum of fourteen forwards, nine defensemen, and three goaltenders. Furthermore, the 2021–22 salaries of the thirty players selected (as measured in terms of what is counted against the
salary cap) had to add up to between 60% and 100% of the 2020–21 salary cap (i.e., the full nominal cap, not the prorated cap for the shortened 56-game season that was played). Seattle was granted a window prior to the draft from July 18 to 21 to sign any unprotected pending free agent (restricted or unrestricted, one per team). Teams that lost a player to Seattle during the signing window did not have a player selected from its roster during this draft as the signed player counted as Seattle's selection. == Protected players ==