Exclusive Details

Adrian Peterson is a married man ... TMZ Sports has confirmed.

We spoke to AP's rep who confirms the Minnesota Vikings running back recently tied the knot to girlfriend Ashley Brown.

The two were both wearing wedding rings at the Starkey Hearing Foundation gala in Minnesota this weekend -- and when a reporter asked Ashley for her last name, she replied, "Peterson."

We're told Adrian and Ashley have been on-and-off since Adrian's college days. As we previously reported, Adrian has 6 children ... and at least one of those is with Ashley.