Do the Giants have “15 or 16 legitimate starters?”

This morning, I listened to Mike Ferrin and Jim Duquette discuss on their Power Alley show for SiriusXM the interview Andrew Baggarly posted to The Athletic yesterday (sub required) with new pitching coach J.P. Martinez. They were piqued by Martinez’s comment that went in the headline, that “We will have 15 or 16 legitimate starters,” and that compelled them to start an exercise I think we can finish.

Do the San Francisco Giants really have 15 or 16 legitimate starters right now?

This isn’t an abstraction about which prospects could become starters at some point in the near future. Martinez’s full quote is unambiguous:

[...] it will be the first time in big-league camp since I’ve been here…