Example:
Team A has 4 possible keepers
Team B has something less than 3
Team A trades one of his players to Team B to get some value instead of just dropping them.
In the past I know I've done this for a swap in say round 4 or something of position.
If Team B keeps 2 or less players can they trade their 2nd or 3rd round pick to Team A as part of the trade to acquire that keeper? Maybe another pick goes back to Team B to keep the player count even?