Jason McCaslin

On October 9, 2018, he and his wife Shannon had a daughter, Ayla Rose McCaslin.

McCaslin has two sisters. On December 22, 2014, his first son Max Grey McCaslin was born.

In December 2009, McCaslin was also producing 5 songs for a new album by Canadian piano rock band The Greatest Invention (Formally – Credible Witness), which eventually got released under Walter Senko. Then in 2010 he began producing 3 songs for 7 Piece Blue grass/Folk/Indie band The Strumbellas. In Sept. 2011 he was asked to produce the rest of the album. The album is now completed and called "My Father and the Hunter". It was released on February 21, 2012 and received a Juno Award Nomination for Best Root/Traditional Album. In October 2013 McCaslin made a cameo playing bass in The Strumbellas music video for End of an Era. In 2013 McCaslin began working with Toronto band Sun K. and produced their 7" (2 songs) which is out now and will also produce their upcoming EP and LP over the next year. In 2014 McCaslin began producing 2 songs for the band "LeBarons" which will be released in 2015.

The band often performs more than 300 times each year and holds long global tours, most of which last more than a year. They have been nominated for seven Juno Awards and have won twice (Group of the Year in 2002 and Rock Album of the Year for Chuck in 2005). Their fifth studio album, Screaming Bloody Murder, was released on March 29, 2011 and was nominated for Grammy at the 2012 Grammy's for the song "Blood in My Eyes" in the Hard Rock/Metal category.

He married on September 5, 2008. During the wedding, McCaslin's fellow band members Deryck Whibley of Sum 41 and Toby Morse of H2O and The Operation M.D. performed "One" by U2 and "Pieces" by Sum 41.

He co-created the garage punk/garage rock side project The Operation M.D., with Todd Morse (of H2O), in which he goes by the name Dr. Dynamite. He plays bass and a bunch of other random instruments on the songs including lead vocals on a few tracks on both albums. The 1st album, We Have an Emergency was released in Canada and Japan exclusively in 2007. Operation M.D. then released their second album "Birds + Bee Stings" worldwide in late 2010 on their own label "Mouth To Mouth Music". He has also acted in many Sum 41 short films. For example, in "Basketball Butcher", he gets beaten up, killed and eaten by Steve Jocz due to beating him at basketball. He also played Dante the drug dealer in "1-800-Justice". He recently helped produce an album with Shelter With Thieves, a Canadian band from Halifax. The EP, entitled Confessions of a Toxic Generation, was nominated for 2 Nova Scotia Music Awards, for Group Recording and also Loud Recording. The band eventually won the Loud Recording award for the EP.

In 1999, the band signed an international record deal with Island Records. The band released their debut album, All Killer No Filler in 2001. The band achieved mainstream success with their first single from the album, "Fat Lip", which reached number-one on the Billboard Modern Rock Tracks chart and remains the band's most successful single to date. All Killer No Filler' was certified platinum in the United States, Canada and in the UK. The band has since released six more studio albums: Does This Look Infected? (2002), Chuck (2004) Underclass Hero (2007), Screaming Bloody Murder (2011),13 Voices (2016) and Order in Decline (2019). Sum 41's first four studio albums are certified Platinum in Canada.

Jason Paul "Cone" McCaslin (born September 3, 1980) is a Canadian musician, singer, songwriter, and record producer, serving as the bassist and backing vocalist of the band Sum 41.