Watson (oblique) was activated from the 60-day injured list Thursday.
Watson, who landed on the injured list in May due to an oblique injury, wrapped up a rehab assignment with High-A Brooklyn on Aug. 21 and has since returned to Double-A Binghamton. He's struggled at Double-A so far this season, accruing a 7.83 ERA and 1.78 WHIP with a 21:14 K:BB across 23.0 innings.