The 24-year-old Jamaican spent the past week with Championship side AFC Bournemouth but clearly failed to impress enough as he has moved on already.
Mattocks only netted six times in 30 league appearances in 2014 and the Whitecaps could be looking to offload him if the right offer comes along.
By allowing him to train with other clubs, Vancouver must be hoping that someone is interested in the former first round SuperDraft pick, but the likelihood is that he will return to MLS with the team this season.
“I’ve had a lot of conversations and a lot of talk about my players,” Whitecaps coach Carl Robinson admitted in November.
“I’ve kept it open at the moment. I haven’t said that I’m looking at doing anything unless something good comes to mind, but you never say never.”
Mattocks admitted that he was still developing as a player and was looking ahead to the 2015 season when speaking at the end of the last campaign.
“I’m adapting,” he said. “It’s good. I’m always going to be adapting, and next season’s going to be the same thing: keep getting better and try my best to help the team move forward.”
The Whitecaps could just be sending Mattocks out to train with other clubs in order to keep him sharp and hope that he improves as a player, but the chances are they are hoping he impresses someone and a reasonable offer comes along.
What do you make of the Darren Mattocks situation? Should he return to MLS with Vancouver for 2015?