Just because he was the PTBNL, doesn’t make him a throw in. Was the 2nd biggest piece of the trade, and they were simply going back and forth between Brantley and Green (who were 7/8 in brewers system -https://www.brewcrewball.com/2008/6/26/559111/breaking-down-the-prospect) to be included.
Ironically; making the playoffs is what made it Brantley rather than Green. That gave Cleveland the decision, and if MKE missed playoffs, it would’ve been their decision and they’d have shipped off Green.