12/15 UPDATE:
The Cubs have signed another International Free-Agent (IFA), bringing the number of IFA signed by the Cubs since the start of the 2017-18 International Signing Period (ISP) to 29 (see updated list in original post below)...
12/11 UPDATE:
The Cubs have signed three more International Free-Agents (IFA), bringing the number of IFA signed by the Cubs since the start of the 2017-18 Internationaal Signing Period (ISP) to 28 (see updated list in original post below)...
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10/28 ORIGINAL POST
The Cubs have signed 20-year old Cuban catcher Alexander Guerra (link is external) to a minor league contract.