Smith (forearm) will begin throwing in three weeks, Rob Bradford of WEEI.com reports.
Smith underwent Tommy John surgery in May, and this would represent the first round of activity since then. The reliever will still likely need to miss a portion of the 2017 season, but if he is indeed able to begin throwing before the end of this season, it will allow the 26-year-old to continue ramping up the activity level as he progresses over the offseason.