Bogar will be the fifth known candidate to interview. Former Padres and Phillies manager Larry Bowa, Nationals third-base coach Bo Porter, Rays bench coach Dave Martinez and Astros interim manager Tony DeFrancesco have also interviewed.
But Bowa is out of the running after telling Fox Sports he will not be the next manager of the Astros, saying he and general manager Jeff Luhnow agreed it's a younger man's job.
"Jeff and I both were under the understanding that long-term, it should be a younger guy -- we both agreed on that," Bowa told the web site. "The interview was really professional. Jeff has his ducks in a row. It's just going to take some time."
Bogar has been on the Red Sox's staff since the 2009 season and is a former manager in the Astros' Minor League system. He began his managerial career in '04 with the rookie-league Greeneville Astros, and the team went 41-26 and won the league title. Bogar managed in Class A Lexington the next year and was named South Atlantic Manager of the Year.
The Indians hired Bogar in '06, and he led their Double-A Akron affiliate to the Eastern League title, earning Manager of the Year honors again.
Bogar, 45, was a shortstop who played nine years in the Major Leagues, including four years with the Astros from 1997-2000.