Also, in digging into the above, I found this in regards to Paul Arriola's transfer to DCU that I didn't know before and was very interesting.
http://www.topdrawersoccer.com/the9...-a-major-precent-with-paul-arriolas-transfer/
Basically, Paul Arriola was in LAG's academy and played for their U-18s. Arriola only played 11 games under LAG's academy and was never signed to a MLS contract, before being picked up by Tijuana.
However, while DCU paid a $3m transfer fee to Tijuana for Arriola, they also had to pay LAG $500k in GAM/TAM to secure his rights.
This will be something to consider as players have been spending time in MLS academies but then going overseas before signing contracts. There will eventually be the possibility that these guys return to MLS at some point.