Steve McCatty (right) talking with Jordan Zimmermann and Kurt Suzuki. (Katherine Frey/TWP)

Nationals pitching coach Steve McCatty remained hospitalized in Washington because of an irregular heartbeat, but he is doing well and will likely be discharged tomorrow, Manager Davey Johnson said. McCatty will not rejoin the Nationals until Friday at the earliest, when the they begin in a series with the Brewers in Milwaukee.

“Cat’s doing all right,” Johnson said. “They’re just being careful with him, and I’m glad they’re doing that.”

For the Nationals’ two games in Detroit, Johnson will perform the pitching coach’s duties, taking visits to the mound when necessary. The Nationals will not add any temporary coaches to the staff.

McCatty first experienced high blood pressure and an irregular heartbeat Sunday morning before the Nationals played the Mets at Nationals Park.

McCatty, who has been the Nationals’ pitching coach since midway through 2009, remains on the Nationals’ minds. Left-hander Gio Gonzalez wore a T-shirt with McCatty’s image. After Johnson finished his daily pregame meeting with reporters, he looked into a camera, waved and said, “Hi, Cat.”