I compare who we currently have lined up at positions with these guys for 2020. in the case of 1st base, we have Travis, Chavis and Holt. Dalbec would offer serious power and good fielding. He is a possible compared to those, especially since Chavis may move to 2nd.
In the case of Chatham, he is a kid with the ability to play short, second and third. He is a line drive hitter and at 6'4" and weighing in around 188, he has potential to get stronger. He would compete with Marco, Lin and Holt.
Duran hasn't been mentioned but he is our 4th ranked minors player. He has the speed to play center field although is still a bit raw. He also doesn't offer much power but may be needed if JBJ goes due to salary reset needs.
All three are low cost players on a team that will need to look for them if they reset.
DHern has already shown enough to make the team next year in our weakest spot, pitching. The other two, Houck and Mata have the stuff to pitch in the bigs, but will they work out? If one of them can, then it helps our starting pitching situation and may allow us to shed one of our big three, assuming Porcello is already gone next season. It will be hard to make a trade with any but maybe Eovaldi is tradeable and with him would go a sizeable long term contract.
I will be interested to see if management (maybe we get a change there as well) has plans to reset and to try and use our best prospects to play on our team. I hope they are not traded away.