Barney Achieves "The Perfect Week" With Help From Jim Nantz and Yankee Nick Swisher Whitney Jefferson · 02/02/10 02:03PM How I Met Your Mother focused around Barney's Perfect Week: going home with a girl seven nights in a row. Sportscaster Jim Nantz helped narrate the story, while Yankee Nick Swisher stands in Barney's way of clinching his number seven.