Alan Shepard

MR-3 May 5, 1961 - Sub-Orbital

Gus Grissom - unsigned

MR-4 July 21, 1961 - Sub-Orbital

John Glenn

MA-6 February 20, 1962 - 3 Orbits

Scott Carpenter

MA-7 May 24, 1962 - 3 Orbits

Wally Schirra

MA-8 October 3, 1962 - 6 Orbits

Gordon Cooper

MA-9 May 15, 1962 - 22 Orbits

Deke Slayton

Did not fly until ASTP in 1975