Fabian Castillo has been eyeing a move to Europe for some time and though FC Dallas has aspirations of winning the club's first MLS Cup title, the Colombian winger doesn't want to stick around for that, making a transfer inevitable.

Castillo is on the verge of having his wish for a move granted. FC Dallas is putting the finishing touches on a sale to Turkish club Trabzonspor for a transfer fee in the neighborhood of $3 million to $4 million, sources confirmed to Goal USA on Friday.

FC Dallas is believed to have been weighing up a handful of offers for the 24-year-old, but Trabzonspor has emerged as the favorite for his services.

With five goals and five assists on the season, Castillo has been one of the key figures on an FC Dallas team currently boasting the best record in MLS. The Colombian has been previously linked to clubs in England and Spain. 

It now looks more likely he will be joining a Trabzonspor side that finished a disappointing 12th in the Turkish Super Liga in the 2015-16 season.

Castillo joined Dallas in 2011 from Deportivo Cali and has excelled with the MLS club, earning his first caps with the Colombian national team in 2015. FCD inked Castillo to a five-year contract in February 2015.