How can I access ESPN+ on Roku?

Does anyone know how on earth I access the ESPN+ streaming service?

I started a subscription today and for the life of me (and two ROKU personnel in a worthless chat session) cannot figure out how to watch a dang baseball game.

I finally gave up and just cancelled the subscription.

But I would like to be able to watch baseball this season (no cable service).  Can anyone tell me if I am to access ESPN+ through the ESPN App or the ROKU App.  

To my knowledge there is no ESPN+ App.

Anywho, any help would be appreciated.