The former AC Milan star will be in the touring party for the trip to Houston but it is uncertain if he will even make the matchday squad.
"Alessandro's going to help our whole team in terms of his ability to see things, to identify things, to read plays," Marsch told reporters.
"He talks a lot with the guys; first half, he was even talking to Zarek [Valentin], talking to him about different things.
"So when you have a guy that has played at the level that he's played at and has the experiences that he has, it's a resource not just for the players, but also for the coaching staff. For all of us."