Uehara, 41, finished the 2016 season with a 3.45 ERA and a 63/11 K/BB ratio over 47 innings. He missed some time in the second half with a strained right pectoral muscle. When Uehara returned from the disabled list on September 7, he tossed 11 scoreless innings with 12 strikeouts and two walks through the end of the regular season. So there’s at least some evidence, albeit in a very small sample size, that Uehara has stuff left in the tank.
The Cubs recently acquired closer Wade Davis from the Royals. Uehara would join Hector Rondon, Pedro Strop, Carl Edwards, Jr., Justin Grimm, and Mike Montgomery in what is once again a very deep bullpen.