Matthew Stafford’s toughness clearly got passed down to his daughters ... 'cause his kids braved through illness to watch the Rams' huge Wild Card victory in person on Monday.
The Super Bowl champ's wife, Kelly, documented the whole journey leading up to the playoff contest ... revealing two of her little ones were hospitalized during the Arizona trip.
One of the kids even had an oxygen mask as they made their way to State Farm Stadium for Monday's kickoff ... holding a teddy bear and yelling "Go Rams" as they rode the bus to the venue.