I think they actually do refer to Starbuck as "Sol" at one point (it's part of his name pun at any rate). Just about everyone refers to him as Starbuck, but I do think they literally call him Solomon "Sol" Starbuck once (maybe when they're talking about the movie they made about him? It might have even been on the poster or something). At the very least, it didn't strike me as immediately wrong like "Shipshape" did!
https://imgur.com/WqDcNNq
https://imgur.com/89Z5jrB