The drums are, without question, owned by the drumline/team.
"Blue Thunder features Guest Drummers at rehearsals and game days as well as an occasional joint performance on a big stage! Some of the more prominent Guests include: Alan White (YES/John Lennon/George Harrison), Chad Smith (Red Hot Chili Peppers), Will Calhoun (Living Colour), David Garibaldi (Tower of Power), Byron McMackin (Pennywise), Mike Derosier (Heart), Scott Rockenfield (Queensryche), Steve Smith (Journey/Vital Information), Yuri Ruley (MxPx), Matt Cameron (Pearl Jam / Soundgarden), John Tempesta (The Cult / White Zombie), and Charlie Benante (Anthrax)."
I'd be quite surprised if, when they don't have a guest, one of their members plays the drumset.
https://www.seahawks.com/drumline/blue-thunder/