Sgt. Joe Rock is the grandson of legendary World War II hero Sgt. Frank Rock, on his mother's side. His father passed away and his mother fell into a coma while he was in the service. Briefly married at the age of 22, his wife died a year later and he was left alone.
- Joseph Rock was one of many characters who was introduced into the DCnU (formerly known as DCU) after the 2011 relaunch.
- 6 Appearances of Joseph Rock (Prime Earth)
- 5 Images featuring Joseph Rock (Prime Earth)
- 1 Quotations by or about Joseph Rock (Prime Earth)
- Character Gallery: Joseph Rock (Prime Earth)