McCann (ankle) caught a bullpen session Saturday and is scheduled to run the bases Sunday, MLive.com's Scott DeCamp reports.
Manager Brad Ausmus said McCann felt good after Saturday's session, and suggested the catcher could soon be ready for about a four-game rehab assignment in the coming days. McCann, who sprained his ankle on April 11, can be activated as soon as April 27, but it appears more likely he'll return a few days after that date.