According to the Coventry Telegraph today, it will not be until August 1st that Chris McCann officially signs on loan for Coventry City.
The 28 year is signed to new MLS side Atlanta United whose new season starts in March 2017 and will join City on loan until January so that he can keep up his match fitness, when his contract starts with them on August 1st.
More on this - http://www.coventrytelegraph.net/sport/football/football-news/hasnt-chris-mccann-signed-coventry-11637777