DeLonge left the band in 2015, but remains friends with Hoppus.
"I too, have been aware of @markhoppus's cancer diagnosis for awhile now," DeLonge tweeted on Wednesday (23Jun21), shortly after his pal's health crisis was made public. "And to add to his own words that he used today, I would also like to say that he is strong, and a super-human who is pushing through this difficult obstacle with a wide-open heart."
He added the hashtag, "#WeHaveHisBack."
Hoppus, bassist and singer for the "All the Small Things" hitmakers, announced he has cancer and has been undergoing chemotherapy treatments in a statement via social media on Wednesday afternoon.
Fellow bandmate Travis Barker was first to share his love for his colleague, telling E! Online, "Mark is my brother and I love and support him. I will be with him every step of the way on stage and off and can't wait for us to play together again soon."
U.S. TV presenter Carson Daly, who got to know Hoppus while hosting MTV's "Total Request Live", also shared a message of support, writing online, "Love you bro. You got this (sic)."
"We may not speak everyday, but I hold in my heart such incredible memories of a time long ago, when we shared a stage & a mic doing what we both loved so much. I've always been such a fan. You're one of the best people I've met in the business & know you will kick the s**t out of this & be back rocking in no time."