Question: Who is older Dave Grohl or Donnie Iris?

Context articles: Poletown (album)
Ah! Leluiah!
Only the Wild Survive
Ah! Leah!
Donnie Iris
These Days (Foo Fighters song)
The Rapper
Jimmie Ross
Magnificent Obsession (album)
Dave Grohl

Poletown is the eighth studio album by American rock singer Donnie Iris, released in 1997.
 It was Iris' third post-major label release, and was released independently on Seathru Records.
Ah!
 Leluiah!
 is the eleventh studio album and the first Christmas album by American rock singer Donnie Iris, released on November 18, 2010.
 The project was first announced by keyboardist/songwriter/producer/legalist Mark Avsec in February 2010 in an interview with "Cleveland Scene".
 (The album title is a pun on Iris' big hit song, Ah!
 Leah!
.)
Only the Wild Survive is an album by Wild Cherry, released in 1979.
 Their fourth studio album, this would be their last before breaking up the same year.
 It was also the first and only Wild Cherry album to feature Donnie Iris (formerly of the Jaggerz) as a performer.
 After Wild Cherry's breakup, Iris and bandmate Mark Avsec would launch Donnie Iris and the Cruisers.
"Ah!
 Leah!"
 is a song by American rock musician Donnie Iris from his 1980 album "Back on the Streets".
 The song was released as a single in late 1980 and reached number 29 on the US "Billboard" Hot 100, 22 on the "Cash Box" Top 100, and 19 on the US "Billboard" Top Tracks chart.
 The song is widely considered to be Iris' signature song and was most popular in Canada, where it became a Top 10 hit.
Donnie Iris (born Dominic Ierace on February 28, 1943) is an American rock musician known for his work with the Jaggerz and Wild Cherry during the 1970s, and for his solo career beginning in the 1980s with his band, the Cruisers.
 He wrote the # 2 "Billboard" hit, "The Rapper", with the Jaggerz in 1970 and was a member of Wild Cherry after the group had a #1 hit with "Play That Funky Music."
 He also achieved fame as a solo artist in the early 1980s with the # 29 hit "Ah!
 Leah!
" and the # 37 hit "Love Is Like a Rock."
"These Days" is the third single, (fourth in the UK), from the American rock band Foo Fighters' seventh studio album "Wasting Light".
 It was written by Dave Grohl and co-produced by Butch Vig.
 Dave Grohl has stated that it is his favourite song that he has ever written.
 On August 18, 2012, the Foo Fighters performed "These Days" at Pukkelpop, as a tribute to the people who died or were injured there a year earlier, due to a violent thunderstorm that raged over the festival grounds.
"The Rapper" is a song by The Jaggerz, written by band member Dominic Ierace, better known as Donnie Iris.
 Released as a single, it reached No. 2 on the "Billboard" Pop Singles chart and was certified Gold by the RIAA in 1970 (see 1970 in music) for selling over a million copies.
 (Iris later launched a solo career; his biggest such hit was Ah!
 Leah!
.)
Jimmie Ross is an American rock guitarist and vocalist who is best known for being a member of Pittsburgh band the Jaggerz, known for their 1970 hit "The Rapper".
 During the band's initial existence of 1965-1976, the bassist shared the duties of lead vocalist with guitarist Donnie Iris.
 By the time the Jaggerz regrouped in 1989, Iris was well into his solo career, and Ross became the sole lead vocalist and remained bassist.
 He continues to hold both positions today.
Magnificent Obsession is the second and final studio album from 1980s pop-rock act Cellarful of Noise, a solo project of Mark Avsec of Donnie Iris fame.
 The album was released in March 1988, with some of the tracks featuring Donnie Iris on vocals.
David Eric Grohl (born January 14, 1969) is an American rock musician, guitarist, singer, drummer, songwriter, record producer, and film director.
 He is the former drummer of the grunge band Nirvana and the frontman and founder of the rock band Foo Fighters, of which he is the lead vocalist, rhythm and lead guitarist, and primary songwriter.