Kansas City Chiefs wide receiver Xavier Worthy was arrested in Williamson County, Texas ... and the allegation is very serious.

Xavier was arrested Friday night on suspension of domestic violence -- specifically, an assault against a family or household member by impeding their breathing or circulation, so apparently choking.

Law enforcement tells us he is still in Williamson County jail -- without bail as he waits to appear before a judge at some point today.

It's not yet clear exactly what occurred ... but the charge is a third degree felony.

In Super Bowl LIX, Worthy had 8 receptions for 157 yards and 2 touchdowns in the 22–40 loss.

He had a breakout freshman year at Texas, breaking several freshman school records ... and he holds the 40-yard dash record at the 2024 NFL Combine with 4.21 seconds.

As a rookie, he finished with 59 receptions for 638 yards and 6 touchdowns in the 2024 season.

We are out to the Chiefs and sheriff for more info ... so far, no word back.