The Baggies signed the Argentine winger on loan from San Lorenzo but Mowbray is not jumping the gun on what he can bring to the Hawthorns.
"He's a bit of a wildcard for us, to see if he can make any impact over the next few months," Mowbray told BBC WM.
"He's obviously not a player I've seen live out in South America but on tape he looks very exciting.
"He's played in Europe, he played at Wolfsburg for three or four years as a very young player.
"I got a bit of feedback from one of his coaches at Wolfsburg who thinks he could use his positive attributes to help our cause."