During the 2017 postseason, the Chicago Cubs bullpen was a glaring weakness, whether the team ultimately won or lost. Friday, the team made its first of many potential moves to upgrade the relief corps for 2018 and beyond.
The Cubs claimed left-handed reliever Randy Rosario off waivers from the Minnesota Twins. With the move, their 40 man roster now stands at 33 players.
Dominant minor league career
While Rosario has just 2 1/3 innings of MLB experience, he also is just 23 years old. Since signing with the Twins in 2010, Rosario has been successful at every minor league level.