Bourgeois had been out all season since he fractured his left scapula during Spring Training. He was on a rehab assignment with Triple-A Louisville since June 8 and batted .309 (17-for-55) in 14 games, including 9-for-17 over his last three games.
With utility player Kristopher Negron demoted to Louisville on Tuesday, the Reds lacked a backup center fielder behind Billy Hamilton. Marlon Byrd, a regular left fielder, started in center field Saturday when Hamilton was given a day off.
"We certainly have coverage at shortstop with [Ivan] De Jesus Jr., but center field -- if something happened to Billy, I would prefer to keep Marlon in left and have more of a speed merchant out there in center. No disrespect," Reds manager Bryan Price said. "It'll be nice to have a guy that is still a true center fielder on the roster."
Bourgeois won't be just a one-day callup as the 26th man. After the game on Sunday, Chris Dominguez was optioned to Triple-A
"Jason is out of options and he's spent the entirety of that rehab time," Price said. "Our hand is forced to make a decision that he has to either be activated or I'm sure, designated. And we're never thinking about designating him. We knew inevitably there would come a time he would be part of this club."
The Reds transferred right-hander Jon Moscot to the 60-day DL to make room for Bourgeois on the 40-man roster.
• Reds lefty reliever Tony Cingrani, who has been on the disabled list with a left shoulder injury since June 15, has been making progress.
"It's going great. More good news," Price said. "He's on a regular throwing program. I believe he'll get off the mound after we get back off the road. He's had zero setbacks. His arm feels great. He's been throwing. He initiated throwing right there at the end of the last homestand. He's back to about 105 feet and having no ill-effects from throwing."
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, follow him on Twitter @m_sheldon and Facebook and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.