It's been a breakout year for the forward, but Oscar Pareja isn't letting him be content with what he's already achieved.
The Cali, Colombia-born Castillo is in his fourth year with the MLS side, and has seen his stock rise immensely in recent weeks. Each of his last seven matches has been marked with at least one goal or assist, and his nine goals this season lead his club's scoring charts.
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"He's committed," said Pareja, himself a former Colombia international. "He understands what it takes to get to the next level. Now he's in a place where he has not been before and he is experiencing that. Now he's feeling it, and he understands that he will be the one to raise his own bar and keep going up. He's young. We forget that he's young - he's just 22. But Fabian has embraced this program and this project and that's great.
"It's a long way to go, it's a long journey. He knows."
The forward has been humble when asked about his success, telling reporters "Things are just falling right for me and for the team right now. Hopefully, I’ll be able to keep playing at a high level.
"All the players on this team have contributed to our success equally."
Dallas went up to 42 points on the season with a 2-1 win over Real Salt Lake friday night in which Castillo scored the winning goal. The result sees it overtake the Claret-and-Cobalt and puts FCD equal on points with three other teams at the top of the Supporters' Shield standings.