2. Matt Moore
Similar to Lopez, Moore is a bullpen guy who is playing out the last month of a one-year deal. His contract is a bit more expensive, however, as he signed a 1-year deal worth $7,550,000 with Los Angeles in the offseason. But Moore has been an effective reliever for two straight years at this point and his ERA sits at a more than satisfactory 2.30 over 40 appearances. Moore's name was also attached to the Cubs all offseason simply because he is an effective lefty set-up man, which the Cubs have lacked most of the year.
Although Drew Smyly is now a member of the Cubs' bullpen, I would feel better if Moore joined him just to give David Ross another solid option for the rest of the season. The only other concern is the fact that the 34-year-old Moore spent 6 weeks on the IL earlier this year with a right oblique strain. Should they make a claim on Moore, the Cubs should definitely do their homework and make sure he's healthy.