Pete Rose has finally OFFICIALLY pulled the trigger on his 26-year marriage ... by filing divorce papers ... TMZ has learned.
The former MLB great filed docs in L.A. County Superior Court asking a judge to end his marriage to Carol Rose .. whom he married in 1984.
Pete cites irreconcilable differences for the split.
According to the docs, Pete is willing to pay for spousal support -- but he doesn't offer up a specific amount.
Pete also lists the date of separation as "TBD" -- which is interesting because he's been dating a model named Kiana Kim since 2009 ... and even brought her on the Howard Stern Show last year to brag about their sex lives.