Major league teams know that they will likely be wheeling and dealing within a few months, and they have scouts out watching minor leaguers that they will potentially be interested in.
There are a number of prospects who have gotten off to slow starts this year, and opposing scouts might consider them to be "buy low" players who they can get in a deal.
Some of these guys could turn things around quickly and become almost untouchable, but others may continue to struggle.
For a prospect to be considered for this list, they needed to be ranked in a preseason top 20 for their team. The players also need to be eligible to be traded, so no one who was drafted last year made this list.