Henry Ruggs was back at the Clark County Detention Center in Nevada this week ... where TMZ Sports has learned authorities made him pose for a new mug shot.
Because the former Raiders star took a plea deal from prosecutors in his DUI crash case on Tuesday, cops tell us he was required to head back to the Las Vegas jail on Thursday to be reprocessed.
As part of the procedure, Ruggs took a new photo ... and you can see, he didn't appear to be pleased to be back in front of a jail camera again.