CINCINNATI -- The Reds announced Saturday that left-handed reliever Wandy Peralta was claimed off waivers by the Giants and that catcher Juan Graterol was activated from the concussion list.

Peralta, 28, was first signed by the Reds out of the Dominican Republic in 2009 and spent parts of the last four seasons in the big leagues. His best season was 2017, when he led all Major League rookies with 69 appearances while posting a 3.76 ERA. Over multiple stints in Cincinnati this season, Peralta had a 6.09 ERA in 39 games with 15 walks and 10 home runs allowed in only 34 innings pitched.

“It was just kind of the right time to give him a new opportunity,” Reds manager David Bell said. “Wandy has been in this organization for a long time. He has a great arm. He’s a great teammate. The amount of effort -- he wants to be good, not only for himself but for his team and organization so bad -- I think he sometimes tried so hard and that can get into the way too.”

With expanded rosters in September, the Reds have 11 relievers in their bullpen, but only one left-hander in Amir Garrett. Bell wouldn’t mind having more lefties at his disposal.

“We know the importance, but it’s not always easy to come by,” Bell said. “We’re trying to have the best bullpen that we can have. It’s nice to have a balance of righties and lefties. But ultimately, we’re trying to get our guys prepared to get both sides out too.”

Graterol last played for the Reds when he started July 24 at Milwaukee. In that game, he had two foul balls ricochet off his catcher’s mask. The second one, by Lorenzo Cain, knocked the mask off and hit his jaw, which forced him to leave the game and enter the concussion protocol. Two days later, he went on the concussion injured list.

After he went through all the testing and was cleared by MLB, Graterol was allowed to return.

Senzel’s shoulder still problematic

Rookie center fielder Nick Senzel underwent an MRI exam Friday for a closer look at his right shoulder impingement. 

“It wasn’t anything too concerning,” Bell said.

Senzel tested his shoulder before Friday’s batting practice by making throws from the outfield. It didn’t go particularly well, and he was limited to only pinch-running in the game. His status for Saturday was still being determined.

Stay gold

For the fourth consecutive year, all 30 Major League clubs used Saturday’s games to raise awareness for childhood cancer. All on-field personnel -- including players, managers, coaches, umpires and the grounds crew, wore gold ribbons on their uniforms and also sported gold wristbands.

MLB’s “Childhood Cancer Awareness Day” is in recognition of September as Childhood Cancer Awareness Month in collaboration with Stand Up To Cancer (SU2C). Childhood cancer is the leading cause of death by disease among children in the United States and Canada.  

The Reds hosted pediatric cancer patients and their families from Cincinnati Children’s Hospital Medical Center and the Dragonfly Foundation for their game vs. the D-backs. Led by pitcher Michael Lorenzen, Reds players recently visited the Cancer and Blood Disease Institute at Cincinnati Children’s.

Moment of silence

Before Saturday’s game, the Reds held a moment of silence for Jon Braude, who died from pancreatic cancer Friday at the age of 68. Braude was the Reds’ publicity director and Riverfront Stadium public address announcer during the 1980s and '90s, including during the club’s 1990 World Series title run. For the past several years, he worked for the broadcast TV crews at Great American Ball Park.