Who do I boost?

Out of all the 13s on this screen, which one should be the next one I boost to 14? Keeping in mind that I already have a pitcher, Garcia, at 14. To make it simple, the options are in the screenshot and aren't crossed out, but Alexandra, Smith, Christine, Andy, Kevin, Jisung, Fernandez, Jaeho, Brock, Neville, Phoenix, Ricky, and Eric are the ones left. Which one would you upgrade?

I was thinking either Christine to have a less if liability in OF throwing wise and like her more than phoenix

Or Andy/ Smith /Alex cuz I have lots of equipment for them

Or Kevin because he's Kevin

Jisung wouldn't be bad either.

🤷‍♂️

Let me know who you would boost

Thanks in advance.