Horvath, on loan from Nottingham Forest, has been capped eight times thus far and his last appearance was in the CONCAAF Nations League draw against El Salvador back in June. USA face Japan in Germany, and then travel to Spain to take on Saudi Arabia.
Meanwhile Amari'i Bell could go head-to-head with Lionel Messi as Jamaica take on Argentina in a friendly during the early hours of Wednesday morning (UK time).
Ed McJannet has been called up for Republic of Ireland U19s for their UEFA Under 19 Championship qualifying matches against Gibraltar, Wales and Hungary.
Best of luck to our three Hatters who are heading away!