In his duties with the Reds, Bavasi will advise and assist Jocketty in matters related to the front office and Major League field, and support personnel and scouting.
"We're excited Bill has joined our organization," Jocketty said on Friday in a statement. "Over his career of more than 30 years, he has worked in almost every facet of baseball operations. We will benefit from his experience and insights."
From 1994-99, Bavasi was the GM of the Angels. From 2003 through June 15 of this season, he was the GM of the Mariners.
Bavasi, whom manager Dusty Baker has known since Bavasi was a teenager, began his career in Major League Baseball in 1974, with the San Diego Padres. He became the Angels' GM after spending 14 years in their player development department.
While with the Angels organization, Bavasi laid the groundwork for the club's 2002 World Series victory. He spent the 2002-03 seasons as the director of player development for the Los Angeles Dodgers before the Mariners hired him to run their organization in November 2003.
Bavasi, 50, comes from a long line of baseball men. His father, Buzzie, was the GM of the Angels and the Brooklyn and Los Angeles Dodgers, and president of the Padres. Buzzie, who passed away on May 2, was also a key figure in the 1940s in the integration of Minor League Baseball.
Bavasi's brother, Peter, was GM of the Padres, founding president of the Toronto Blue Jays and president of the Cleveland Indians.
Justice B. Hill is a senior writer for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.