"Ramblin' Man" was first created during songwriting sessions for Eat a Peach. An embryonic version, referring to a "ramblin' country man," can be heard on the bootleg The Gatlinburg Tapes, featuring the band jamming on an off-day in April 1971 in Gatlinburg, Tennessee. Betts continued to work on the song for a year, but the lyrics came together in as little as twenty minutes. "I wrote "Ramblin' Man" in Berry Oakley's kitchen at about four in the morning. Everyone had gone to bed but I was sitting up," said Betts in 2014. Trucks noted that the band acknowledged it was a good song but were reluctant to record it, as it sounded too country for them. New member and keyboardist Chuck Leavell enjoyed the song, noting, "It's definitely in the direction of country but that didn't bother me in the least I think our attitude was, 'Let's take this thing and make it as great as we can.'" The song was inspired by a 1951 song of the same name by Hank Williams. It was one of the first songs, alongside "Wasted Words", recorded for Brothers and Sisters. They went to the studio to record a demo of the song to send to a friend, which is where the long guitar jam near the finale of the song was created. Having not considered it an Allman Brothers song before, they felt the solos fit the band well and decided to put it on the album. Guitarist Les Dudek, who was contributing to Brothers and Sisters, was sitting in the control room when the song was being recorded. He and Betts had worked out the harmony parts together. Betts continued to approach him for his thoughts on the recordings; eventually, he asked him to come record the song with him. "We played it all live. I was standing where Duane would have stood with Berry just staring a hole through me and that was very intense and very heavy," said Dudek. When the song was completed, the management team and road crew gathered to listen to the song. According to Dudek, the room was silent upon its ending and roadie Red Dog remarked, "That's the best I heard since Duane." Johnny Sandlin, producer of Brothers and Sisters, remarked that he thought it was "crazy" to be released as a single, because "nothing else sounds remotely similar, with the possible exception of "Blue Sky," which had a similar, upbeat major-key bounce."
Capricorn executives were split between issuing "Wasted Words" or "Ramblin' Man" as the lead single. National promotion director Dick Wooley sent advance tapes of "Ramblin' Man" to WQXI-AM in Atlanta and WRKO-AM in Boston radio stations and "listener phone-in reaction was near-phenomenal." "Ramblin' Man" broke hard rock barriers and became a hit onAM stations nationwide, and it rose to number two on the Billboard Hot 100. It was prevented from topping the chart due to the success of Cher's "Half-Breed." AllMusic writes that "the chorus is perhaps the catchiest and prettiest hook in all of Southern rock". Robert Christgau called the tune "miraculous".
"Ramblin' Man" can be heard in the 1973 filmThe Exorcist, playing on a jukebox in a bar where two priests are conversing over beers at a table. In the 1989 movieWhen Harry Met Sally..., it can be heard playing in the background in a diner scene. It can also be heard in Season 1, Episode 1 of the TV series Supernatural. In an error, it can also be heard in Supernatural Season 4, Episode 3 entitled "In the Beginning". Dean gets transported back in time and wakes up on a park bench. He stumbles into a diner where "Ramblin' Man" is playing on the jukebox and you can see the date on the newspaper that reads April 30, 1973, three whole months before the song was released. Scott Porter covers the song in Hart of Dixie Season 02 Episode 02. The song is playable in the music video gamesGuitar HeroWorld Tour and Rock Band 2. One of the horses used by a minor character in JoJo's Bizarre Adventure:Steel Ball Run is named Ramblin' Man.