The Cubs reinstated Maton (knee) from the injured list Saturday, Patrick Mooney of The Athletic reports.
Maton landed on the injured list in late June with right knee tendinitis but has now been cleared to return to Chicago's bullpen after tossing 1.2 shutout innings during his lone rehab outing at Triple-A. The 33-year-old has struggled to find his footing this year, turning in a 6.08 ERA and 1.76 WHIP over 26.2 innings. He'll replace Jake Woodford on the active roster.