He is wearing the number 10 on his jersey. As you said, probably taking LW and with Buka on the right. I hope he will taking the place of Jader Obrian - I think he was the weakest link on offense. I can't wait to see Buka, Vazquez, and Uzuni on the pitch at the same time. They will be trouble for the opposing defenses because you can only double team one.
Re-watched the game this morning. I don't agree with @Bottlecap's assessment of Owen. He possessed the ball quite a bit, mainly because he is very good at off-the-ball movement. I like how he takes the ball, upon receiving a pass on the wing, diagonally towards the top of the box. He had a near miss on one of those runs and some perfectly weighted passes back to Buka. His corner kick dropped perfectly on Cascante which allowed for the lone goal (his earlier corner was right to the first defender, though). I'd like to see him continue in this offensive role. He doesn't have quite the ball skill at his feet as Dani, but I think he has a higher ceiling.