Uehara is the second significant bullpen addition of the week for the Cubs, who also acquired Wade Davis in a trade with the Royals. Uehara will serve in a late-inning role for Chicago in front of Davis alongside Hector Rondon, Pedro Strop, Carl Edwards Jr. and Justin Grimm.
Uehara spent the last last four seasons in Boston, registering a 2.19 ERA and saving 79 games for the Red Sox while winning a World Series championship in 2013. Boston had interest in a reunion with the right-hander, but shut the door on that possibility by acquiring Tyler Thornburg from the Brewers.
Uehara, who turns 42 in April, is a veteran of eight major-league seasons. In that span, he owns a 2.53 ERA and has saved 93 games in 387 appearances.