McLain (calf) will take batting practice on the field in Seattle on Monday, MLB.com reports.
McLain rejoined the Reds on their current road trip, which moved from Colorado this weekend to Seattle for a three-game set against the Mariners beginning Monday. He's been doing on-field work with teammates and can be activated at any point. By bringing McLain on the road with them, the Reds are signalling an imminent return. Possibly for this series in Seattle or the next in St. Louis.