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Primarily an infielder, Ryan has seen action at every position except for center field and catcher in his career.
The Cubs designated right-hander Yoervis Medina for assignment to make room for Ryan on their 40-man roster. Medina, 27, was 1-0 with a 4.71 ERA in 17 relief appearances with the Mariners and Cubs last season.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.