The Chicago Cubs have been oft-mentioned as one of the organizations that have significantly improved over the course of the offseason. By adding significant low-risk, high-upside arms to the rotation and bullpen, the team has addressed a weakness that plagued them over the course of the 2012 campaign, and should help increase competitiveness on the field in coming months.

The biggest signing of the offseason is right-hander Edwin Jackson, who continues his journeyman career after appearing with the White Sox, Cardinals and Nationals over the past few seasons. The 29-year old went 10-11 with a 4.03 ERA in 2012 with Washington, which was his highest mark since 2010, when he posted a 4.47 ERA, splitting the season between Arizona and Chicago.

His contract gives the Cubs four years of control for $40 million, which allows Chicago to remain competitive while avoiding the potential pitfalls of a high-risk, high-cost contract. Jackson is not expected to be an ace, but as the Cubs continue to add arms over the next couple years, he can be a solid 2 or 3 starter behind Matt Garza (if he lasts the season in a Cubs uniform), Jeff Samardzija and the “ace” that the team desperately needs to be a legitimate contender.