Question: Are Dan McCafferty and Eddie Vedder both singers?

Context articles: Black (Pearl Jam song)
Eddie Vedder
Water on the Road
Jeremy (song)
Mind Your Manners (Pearl Jam song)
Painted Thin
Dan McCafferty
If Life Was Easy
Back to the Trenches
Rock 'n' Roll Telephone

"Black" is a power ballad by the American rock band Pearl Jam.
 The song is the fifth track on the band's debut album, "Ten" (1991).
 Featuring lyrics written by vocalist Eddie Vedder and music written by guitarist Stone Gossard, "Black" is said to be about first relationships, though Vedder showed strong emotion while performing the song live in early years.
 (In relationship with Beth Liebling from 1983-2000) Notably, Vedder now renders the added lyric "We belong together" as "I've been healed" or "We didn't belong together" indicating his moving on from the relationship and being content with how it ended.
Eddie Vedder (born Edward Louis Severson; December 23, 1964) is an American musician, singer and songwriter best known as a member of the rock band Pearl Jam, with whom he performs lead vocals and is one of three guitarists.
 He is known for his powerful baritone vocals.
 He also appeared as a guest vocalist in Temple of the Dog, the one-off tribute band dedicated to the late singer Andrew Wood.
Water on the Road is a film released on DVD and Blu-ray by American singer and Pearl Jam frontman Eddie Vedder.
 It documents Vedder's 2008 solo tour, during which he performed Pearl Jam songs, numerous covers, and solo works including songs from the "Into the Wild Soundtrack".
 The film features mostly performances from two shows Vedder performed on August 16 and 17, 2008, at Warner Theatre in Washington, D.C. It was released on May 31, 2011.
"Jeremy" is a song by the American rock band Pearl Jam, with lyrics written by vocalist Eddie Vedder and music written by bassist Jeff Ament.
 "Jeremy" was released in 1992 as the third single from Pearl Jam's debut album "Ten" (1991).
 The song was inspired by a newspaper article Vedder read about a high school student who shot himself in front of his English class on January 8, 1991.
 It reached the number five spot on both the Mainstream and Modern Rock "Billboard" charts.
 It did not originally chart on the regular "Billboard" Hot 100 singles chart since it was not released as a commercial single in the US at the time, but a re-release in July 1995 brought it up to number 79.
"Mind Your Manners" is a song by the American alternative rock band Pearl Jam.
 It was released on July 11, 2013 as a digital download as the lead single from their tenth studio album "Lightning Bolt".
 Writing for "The Globe and Mail", Brad Wheeler said the song was "lean, swift and punishing".
 Pearl Jam guitarist Mike McCready said "It's my attempt to try to make a really hard edge-type Dead Kennedys-sounding song".
 Singer Eddie Vedder's lyrics criticize organized religion, which Vedder considers hypocritical for their intolerance and "so many of the things which have come out of those organizations– like the abuse of children and then its cover-up."
Painted Thin was a Canadian hardcore punk band, formed in Winnipeg, and active from 1993 to 1999.
 The core of the band consisted of vocalist and guitarist Stephen Carroll and bassist and vocalist Paul Furgale, with a variety of guest musicians, including James Ash, Dan McCafferty and Jason Tait, on individual recordings.
William Daniel "Dan" McCafferty (born 14 October 1946, Dunfermline, Scotland) is a Scottish vocalist, best known as the lead singer for the Scottish hard rock band Nazareth from its founding in 1968 to his retirement from touring with the band in 2013.
 McCafferty continues to perform solo around the world and record on occasion.
If Life Was Easy is the fifth solo album by Deep Purple's bass player Roger Glover released by earMusic/edel on July 11, 2011.
 The album was recorded in 2007 but due to personal reasons it wasn't released until 2011.
 Like its predecessor, "Snapshot" (2002), it features The Guilty Party which includes Randall Bramblett and Gillian Glover.
 Guest appearances are from Nazareth's Dan McCafferty and Pete Agnew as well as Walther Gallay and Sahaj Ticotin.
The CD comes with a fifty-two page booklet containing old photos and interviews with Pete Agnew and Dan McCafferty.
 It also was issued on vinyl.
Rock 'n' Roll Telephone is the twenty-third album by Scottish rock band Nazareth, released in June 2014 by Union Square Music.
 It is their last album with original singer Dan McCafferty who left the group before its release.