Roster locked rule explain ??

Why kc can add new player still ?? Edit : assistant coach lol i know !! Kc is done

Did you catch the full headline? They already had a 6th person signed for the active roster, their assistant coach. It's not a new player from outside of the league or even outside of the current team

pretty sure the rule is u need to have ur main 5 signed for the duration of the roster lock but the 6th can sub in for any player at any time and u can also change out ur 6th player as much as u want