Please be advised that the Commissioner’s Office and the Players Association have agreed to amend the Major League Rules in advance of this year’s Rule 4 Draft with respect to players-to-be-named-later (“PTBNLs”) under Rule 12(e)(2), and the trading of draft picks under Rule 3(b)(6). …commencing with players eligible for the 2015 Rule 4 Draft, (a) players selected in the Draft may be traded beginning on the day following the conclusion of the World Series, and (b) drafted players cannot be PTBNLs unless they otherwise could be traded pursuant to Rule 3(b)(6), as amended, at the time of the trade.
http://www.fangraphs.com/blogs/mlb-fixes-the-trea-turner-problem-for-everyone-else/