(Reuters) - Scottish soccer club Celtic Chief Executive Dom McKay has stepped down for personal reasons, after just over two months in the role, the London-listed club said http://newsfile.refinitiv.com/getnewsfile/v1/story?guid=urn:newsml:reuters.com:20210910:nRSJ4622La&default-theme=true on Friday and named insider Michael Nicholson as its acting chief.