Marosi is trying to earn a professional contract after being recommended to the club by former Latics defender Barry Knowles - the man who delivered Leighton Baines to Wigan.
"Marko is only 19 but has come from college football in Burnley and I think he has a great future in the game," said Knowles to the Wigan Observer.
"He is one to keep an eye on and hopefully he will have a decent career at Wigan.
"He'll be there on trial until the end of the season. I have high hopes for him."