Ken Mattingly was an American astronaut in NASA's Apollo program and space shuttle orbiter program. He was a crewmember, along with Duke and Young, on Apollo 16. As well, he was a crewmember on STS-51C.
In 2143, the assignment patchs for these missions were on display in the 602 Club. These patches bore the astronaut's last name. (ENT: "First Flight")