Gregerson, who is on the Family Medical Emergency List, could return as early as Tuesday, the Houston Chronicle reports. "The earliest will obviously be Tuesday, and that's what we're hoping for," manager A.J. Hinch said. Gregerson left the team on Friday and it's thought he'll be back early this week, but nothing has been confirmed. Chad Qualls will likely continue to be the top option for saves while Gregerson is out.