Caratini was added to the Cubs' 40-man roster on Friday.
Caratini registered a solid season with Double-A Tennessee in 2016, posting a .291/.375/.405 line with six homers. He probably isn't seeing regular playing time in the majors anytime soon with Willson Contreras ahead of him, but he's looked decent enough that the Cubs chose to protect him from the Rule 5 draft.