Welcome to The Walk Off, the nightly MLB recap from Big League Stew. Here we'll look the top performers of the night, show you a must-see highlight and rundown the scoreboard. First, we start with the ridiculous start Bryce Harper is having to this season. Only seven players in history have won the National League MVP award in back-to-back seasons and while there is a long way to go this year, Bryce Harper is well on his way to adding his name to that list. The Washington Nationals slugger crushed his second Grand Slam of the season on Tuesday night in a 7-0 win at Miami and is now hitting .333 with seven home runs and 20 RBI in his first 45 at-bats of the season. The Nationals scored all seven of their runs in the seventh inning. Harper's 413-foot home run came off Miami reliever Chris Narveson and it came less than a week after he hit his first Grand Slam of the season against Atlanta. This is easily the best start to a season in Harper's young career. His previous best came in 2013, his second season in the big leagues when he was hitting .320 with five home runs and 10 RBI after 13 games. [ Giants fan leaves game in shame after making a huge mistake ] Harper was 22 years, 353...