Ty Lawson has some serious explaining to do ... because officials in Denver believe the Sacramento Kings star violated his probation and are gunning for a warrant, TMZ Sports has learned.
Lawson is currently on probation stemming from his 2015 drunk driving case in Denver -- but the Denver Probation Dept. has filed a complaint seeking to revoke his probation citing a potential violation.
Officials would not say what the alleged violation is ... but confirmed to TMZ Sports that a bench warrant has been requested so they can bring Lawson to court for a hearing on the matter.