In part of the networks buildup to the much-anticipated HarBowl, ESPN is showing viewers exclusively obtained home footage of Jim and John Harbaugh coaching together in their backyard as young boys, sources confirmed Friday.We thought it would be nice to give a glimpse into what these two phenomenal NFL coaches were like when they were kids and just coaching football in the yard without a care in the world, said SportsCenter executive producer Alex Durbin, adding that the old clips of the Harbaughs screaming play calls, managing the game clock, and slamming their Fisher-Price headsets to the ground after giving up touchdowns has already garnered a very positive response from ESPN viewers. As you can see, back when Jim and John were 7 and 8, coaching football wasnt about winning championships. It was just about getting outside with friends and running up and down the sidelines until it was too dark to see the clipboard. Reached for comment, Jack Harbaugh told reporters that regardless of which team wins the Lombardi Trophy, he is simply proud that his sons never lost the childlike petulance they always had as young coaches. 