On Blabbermouth.com, Mikael Åkerfeldt stated that Axenrot completed his drumming parts for eleven tracks on the Opeth album Watershed in just seven days.

Martin Axenrot's second band, Triumphator, formed in 1995 and made two records ("The Ultimate Sacrifice" EP and full length "Wings of Antichrist").

With Opeth searching for a temporary drummer, Patrik Jensen suggested to Åkerfeldt that his bandmate in Witchery, Axenrot, fill in.

[6] On 16 November 2021, after 16 years with the band, it was announced that Axenrot had left Opeth due to "conflict of interests" (his Bloodbath bandmate Nick Holmes said in an interview that Axenrot decided against taking the COVID-19 vaccine[7]); Sami Karppinen filled in for the North American tour with Mastodon.

[8] In 2010 Axenrot, together with Opeth bassist Martin Mendez, performed together with the late Jon Lord and an Orchestra in Nidarosdomen, Trondheim, Norway.