Ultrarunners Catra Corbett and Marshall Ulrich on HBO's "Real Sports" Tonight

I'll be watching HBO's Real Sports' report on "Obsessive Runners" tonight at 10 pm.  They interview drug-addict-turned-ultrarunner Catra Corbett, ultrarunning legend Marshall Ulrich, and "Raven," a man who lives in South Beach and has run eight miles every day since 1975.

                                                  Catra Corbett

                                                       Marshall Ulrich