Of course, other sources would later contradict this account, with Captain Pike having commanded several successful 5-year missions before Kirk, but that's pretty much par for the ST-continuity course.
I said earlier "relatively unscathed", but in fact, it's "relatively intact
". [Novelization of TMP, p. 6]
Pike may have completed several 5YM, but was the "ship and crew relatively intact" each time?