Frightening moment for Richard Sherman's family ... the wife of the future Hall of Famer shared surveillance photos of several armed men inside their Washington state mansion over the weekend -- and cops tell TMZ Sports they're now investigating the alleged burglary.
Ashley Moss -- who married the former NFL star in 2018 -- posted a few screengrabs from the couple's home security system on social media, with timecodes showing the incident happened on March 29.