Ben Stiller's still feelin' the pain from the Knicks' crushing defeat to the Pacers ... and with no NBA Finals game to attend at MSG, the actor threw on his finest tux and hit up the Tony Awards just a handful of blocks from the arena, where the actor lamented the loss in front of the A-list crowd!
Stiller's mini-therapy session went down Sunday night at Radio City Music Hall -- the biggest night in theatre -- when Stiller was on stage to present the award for Best Play.