David Alexander Wolf

David Alexander Wolf (born August 23, 1956) is an American astronaut, medical doctor, electrical engineer. Wolf has been to space four times.

Three of his spaceflights were short-duration Space Shuttle missions, the first of which was STS-58 in 1993, and his most recent spaceflight was STS-127 in 2009. Wolf also took part in a long-duration mission aboard the Russian space station Mir which lasted 128 days, and occurred during Mir EO-24. He was brought to Mir aboard STS-86 in September 1997, and landed aboard STS-89 in January 1998. In total Wolf has logged more than 4,040 hours in space.

He is also a veteran of 7 spacewalks totalling 41hrs 17min in both Russian and American spacesuits.