Summary: Four wins from four in the Heineken Cup for the Irish provinces last weekend, and Ulster might just be the form team in Europe at the moment. Shane Horgan and Eddie O'Sullivan on what Ulster learnt from last year, Munster and Leinster flaws, and who is best placed to take over from O'Driscoll at the end of the season. The subject of concussions in rugby has been getting plenty of coverage recently, and we speak to a player who's had more than his fair share of difficulties in that area - Ulster and Ireland centre Luke Marshall. And 6 months after the Boston marathon bombing, we hear how the city's most potent sporting symbol, the Red Sox, have played a part in the recovery process. All that plus baseball's Macho Man Randy Savage, the frequency illusion, Rock of Gibraltar and retiring the 13 jersey.
