Follow the steps below for best practices for handling a player being traded from one team to another within the same league.
Before initiating this process, make sure the "Career Stats" Site Setting is enabled.
Step 1: Go to the player profile on Team A, click "Edit Player Details"
Step 2: Uncheck the "Active Roster" checkbox, click "Save Player"
Step 3: Create a new player profile on Team B (and fill in all info as if you are starting from scratch)
Step 4: Once profile is created select "Connect Roster Players" from it
Step 5: Enter the player's name and click "Search" > Select the 'Connect' checkbox to link the listed player to the current player profile > Select "Save Linked Profile"
Step 6: Complete season stats are now linked for the player