Nathan (elbow) was activated by the Cubs prior to Sunday's matchup against the Brewers, Patrick Mooney of CSN Chicago reports.

EDGE Analysis

Nathan will make his long-anticipated return after undergoing Tommy John surgery in the spring of 2015. The 41-year-old allowed four earned runs in 9.1 rehab innings, but struck out nine and allowed opponents to post a sub-.100 batting average. He'll look to provide bullpen depth in Chicago -- a team that is widely rumored to be in search of high-profile talent to help bolster a struggling crew of relief arms.