"Dave Eiland took a personal leave of absence and will be gone as long as he needs," Girardi announced before Friday's series opener at Rogers Centre. "That's all I'm going to say."
In Eiland's absence, bullpen coach Mike Harkey will serve as the pitching coach while scout Charlie Wonsowicz will replace Harkey in the 'pen.
"We'll carry on," Girardi said. "Obviously, Dave's very valuable to us and we're going to miss him. Just like when you have a player go down, people have to pick up and help out. Everyone will help out, and we'll make it work."
Girardi did not specify either a reason or a timetable for Eiland's absence.