Article about Kristaps Porzingas, who was on the same team that signed Jerel. Remember that Jerel left that team following his father's death and came back to the US.
http://www.nytimes.com/2015/07/08/sports/season-at-dysfunctional-sevilla-should-have-kristaps-porzingis-ready-for-knicks.html?smid=tw-share&_r=0
"Oh, man, that season was a mess," said Derrick Byars, a teammate of Porzingis's. "At this point, I don't even mind saying that was the most unprofessional team I've been around."
Multiple American players left mid-season.