"While all players in both current playing squads have returned negative COVID results overnight, two members of the Irish support staff have tested positive, as well as several partners of players, resulting in two of the Irish players being deemed as close contacts," read an official statement.
The United States' one-day cricket international match with Ireland due to be played on Sunday has been cancelled because one of the umpires has COVID-19, USA Cricket said.
United States notched their first-ever T20I win against a Test playing nation as they beat Ireland in the first match of the two-match series on Wednesday.
Wicket-keeper batter Monank Patel has been appointed as USA's skipper ahead of the Ireland series.
USA captain Saurabh Netravalkar was reprimanded for breaching Level 1 of the ICC Code of Conduct during the first game of the ICC Men's Cricket World Cup Super League 2 against Nepal in Muscat.
USA batsman Jaskaran Malhotra became only the fourth batsman to hit 6 sixes in an over as he smashed Papua New Guinea's Gaudi Toka for 36 runs in the final over on Thursday.
Surrey and England fast bowler Liam Plunkett will leave English cricket at the end of the current season to sign with Major League Cricket in the USA.
IPL 2020: Tim Seifert has never appeared in the Indian Premier League before.
Sandeep Lamichhane was the wrecker-in-chief, taking six for 16 as the American side were finished off in 12 overs in the World Cup league two match in Kathmandu.
GS Lakshmi has already officiated in several T20 Internationals, both for men and women.
The six match tri-series on the road to the World Cup 2023 sees USA and Namibia make their debut in the CWC League 2 competition.
The USA Cricket has also appointed former India spinner Sunil Joshi as spin bowling advisor, and Pravin Amre and Kieran Powell as advisors for the batting department.
Xavier Marshall hit form at just the right time as his century confirmed USA's ODI status and helped see off Hong Kong by 84 runs.
The International Cricket Council (ICC) on Tuesday welcomed USA Cricket as its 105th member.
The legendary Indian 400m runner also says that Carl Lewis was so awestruck after watching his biopic that the multiple Olympic medallist sent him a baton as a mark of respect.
The Jamaican quartet of Nesta Carter, Kemar Bailey-Cole, Nickel Ashmeade and Bolt clocked 37.36sec, with the United States claiming silver in 37.56sec and Britain taking bronze (37.80).
A wire transfer of a little more than USD 8100 had to be returned to ICC Americas headquarters in Toronto after it was revealed to have been intended for United States of America Cricket Association (USACA) and not for USYCA.
US sprint and long jump legend Carl Lewis said on Monday that Asians badly needed "heroes" in track and field in their countries to become a world-class force in the high-profile sport.