Adrian Peterson's Son -- Props From Vikings Fans ... After Daddy Dominates!

C'mon, this is just adorable ...

Check out Adrian Peterson and his son Adrian Peterson Jr. slappin' high-fives with Minnesota Vikings fans outside TCF Bank Stadium on Sunday ... right after AP dominated the Detroit Lions.

The pics are cute -- AP2 had a custom #28 jersey with the name "Daddy" across the back ... and a huge smile across his face.