Prop Eugene McGovern was the only player from the original squad of 26 players not to travel as he suffered a slight hamstring strain during Tuesday's training session in Limerick.
Among those who accompanied the squad Stateside were Munster Branch President Gerry Oâ00Loughlin, immediate past President Ken Lyons, Branch Treasurer Jim Riordan and John Hartery, Chairman of the Provincial Management Committee, the body that oversees the professional game.
On hand to meet the Munster squad when they arrived were USA Rugby official John Broker and Mark Campbell from County Armagh, who will act as liaison officer for the Munster party while they are in Chicago.
Today the Munster players took part in an open training session in the city followed by a coaching session with some young children from the locality. This evening the tour party will attend an Irish Consulate Reception at the Union League hosted by the Consul General of Ireland Sean Farrell.
Sunday's game at Toyota Park has an 8pm kick-off (Irish time) and will be covered live by Setanta Sports Ireland.