Patrick Mahomes says his father is "doing good" following his DWI arrest ... but the Chiefs star didn't want to reveal much further about his dad's legal issues, explaining, "It's a family matter."
The quarterback opened up briefly about Patrick Mahomes Sr.'s situation while he was on the podium at Super Bowl Opening Night at Allegiant Stadium on Monday ... after he was asked twice about his pops' run-in with cops on Saturday in Texas.
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He kept things short and sweet .