Maybe he read Hub Blog over the weekend and realized his run for mayor was doomed before it even started? Anyway, Tom O’Brien has decided not to run for mayor, apparently reversing a pre-weekend decision to go for it, the Globe and BBJ report. … What a weird turn of events. … Can I technically say I predicted “Mayor O’Brien” wasn’t going to happen? I mean, after all, it’s not going to happen. … UH’s headline: “Rich guy decides not to run for mayor against the other rich guy and the incumbent.” … I guess this means Josh Kraft will make it to the second round before getting beat by Wu in November. …