Since his son was a toddler , David called him JR , as in David Junior .
JR 's given name is David Christopher Justice , the same as his father 's , but he has never answered to David .
Since David 's son was a toddler , David called JR JR , as David   Junior .
JR 's given name is David Christopher Justice , the same as his father 's , but he has never answered to David .