Question: Rusty Day was best known for his work with an American musician who was the guitarist, vocalist, and wongeriter for what Southern Rock Band?

Context paragraphs:
Gator Country: Gator Country was an American Southern rock band formed in Davie, Florida, in 2005 by several ex-members of the Southern rock group Molly Hatchet.  The band, founded by vocalist Jimmy Farrar, guitarist Duane Roland, drummer Bruce Crump, guitarist Steve Holland, and bassist Riff West took its name from the title of the hit song, "Gator Country".

'Ot 'n' Sweaty: 'Ot 'n' Sweaty is the fourth album by the American rock band Cactus.  It was released in 1972.  Original members Jim McCarty and Rusty Day had left the group, so bass guitarist Tim Bogert and drummer Carmine Appice were joined by Werner Fritzschings on guitar, Duane Hitchings on keyboards and Peter French (ex-Leaf Hound and Atomic Rooster) on vocals.  This was the band's final album before their long hiatus that lasted until 2006.  The first three songs (filled up the first side of the original LP) were recorded live on April 3, 1972, in Puerto Rico at the Mar Y Sol Pop Festival, and the rest (the second side of the LP) were recorded in studio (so on the album's front cover is pointed after the band's name: On Stage In Puerto Rico And In The Studio).  The pinnacle tracks for this album are "Bad Stuff", "Bringing Me Down", "Bedroom Mazurka", "Telling You", and a live recording of Let Me Swim, which was a song by the original Cactus on their 1970 debut album[].

Detroit (band): Detroit (a.k.a.  The Band Detroit, so as not to be confused with the city of Detroit) was a spinoff of rock group The Detroit Wheels.  This revised version of that band was formed by Mitch Ryder as a successor to The Wheels in 1970.  The only original Wheel in the group was the drummer Johnny "Bee" Badanjek; other members were guitarists Steve Hunter and Brett Tuggle, organist Harry Phillips and bassist W.R. Cooke.  A single album was released by this grouping, a 1971 self-titled LP issued on Paramount Records (US #176 in 1972).  They had a hit with their version of the Lou Reed - penned song "Rock & Roll", which Reed liked enough to ask Steve Hunter to join his backing band.  Ryder quit the group because of voice problems in 1972, and Detroit vocalist Rusty Day (formerly of the American Amboy Dukes and Cactus) took over his spot; without Ryder, the group floundered, and eventually broke up in 1974.

Ed King: Edward C. "Ed" King (born September 14, 1949 in Glendale, California) is an American musician.  He is best known as the guitarist for the psychedelic rock band Strawberry Alarm Clock and guitarist and bassist for the Southern rock band Lynyrd Skynyrd from 1972 to 1975 and again from 1987 to 1996.

Steve Gaines: Steven Earl "Steve" Gaines (September 14, 1949 – October 20, 1977) was an American musician.  He is best known as a guitarist, vocalist and songwriter of Southern rock band Lynyrd Skynyrd from May 11, 1976 until his death on October 20, 1977 and is the younger brother of Cassie Gaines, who was a back up vocalist for the band's live performances.

Rusty Day: Russell Edward "Rusty Day" Davidson (born in Garden City, Michigan) was a lead vocalist, best known for his work with Steve Gaines, Cactus and The Amboy Dukes.

Rickey Medlocke: Rickey Medlocke (born February 17, 1950) is an American musician best known as the frontman/guitarist for the southern rock band Blackfoot and a member of Lynyrd Skynyrd.  During his first stint with Lynyrd Skynyrd from 1971-1972 he played drums and sang lead on a few songs that would initially be released on 1978's "First and Last".  Medlocke would rejoin Blackfoot in 1972 and later returned to Lynyrd Skynyrd in 1996 as a guitarist with whom he continues to tour and record today.

Move (Third Day album): Move is the tenth studio album by Christian rock band Third Day.  Released on October 19, 2010, the album was the band's first after guitarist Brad Avery left Third Day.  The band wanted the album to be a departure from the modern rock stylings of "Revelation" (2008), intending to show more of their southern rock roots.  Third Day chose to work with producer Paul Moak on the album and recorded it at their own studio, feeling it offered them more creative freedom.  Primarily a southern rock album, "Move" also has significant influence from gospel music.

Blackfoot (band): Blackfoot is an American Southern rock band from Jacksonville, Florida formed during 1970.  Though they primarily play with a Southern rock style, they are also known as a hard rock act.  The band's classic lineup consisted of guitarist and vocalist Rickey Medlocke, guitarist Charlie Hargrett, bassist Greg T. Walker, and drummer Jakson Spires.

Danny Chauncey: Daniel Smith "Danny" Chauncey (born June 19, 1956) is an American rock guitarist.  He is best known for being a member of the Southern rock band 38 Special since 1987.  The band, which started as a Southern rock band and switched to a more straight-ahead rock sound, had several hit singles between 1981 and 1991.

Supporting paragraphs: Rusty Day Steve Gaines
Answer: Lynyrd Skynyrd