Rams head coach Sean McVay's LA home was burglarized Thursday night by men who broke in and made off with a bunch of valuables ... law enforcement sources tell TMZ Sports.
We're told 3 men wearing hoodies, bandannas and gloves smashed through the back door of the home ... before stealing jewelry and expensive purses.
No one was home ... and McVay's security system went off -- alerting police to the break-in -- but when they arrived, the thieves were gone.
In addition to what was stolen, we're told there was at least $20K worth of damages to the house.