The Cubs made a series of roster moves before the Christmas holiday.
The Cubs claimed pitcher Edgar Olmos off waivers from the Baltimore Orioles Wednesday, released infielder Brendan Ryan and had pitcher Yoervis Medina claimed off waivers by the Pittsburgh Pirates.
[RELATED - Cardinals move on from Lackey, Heyward by signing pitcher Mike Leake]
Olmos, a 25-year-old left-hander, came to the Cubs initially as a waiver claim on Dec. 4 from the Seattle Mariners, before the club put him right back on waivers and the Orioles scooped him up Dec.