After Arizona Diamondbacks top prospect Ryan Waldschmidt reviewed the footage of his first MLB hit, it was tough to focus on the swing itself. Waldschmidt was called up to the majors earlier on Friday , and was not in the starting lineup against the New York Mets Friday night. But manager Torey Lovullo called on the 23-year-old outfielder in the eighth inning to make his MLB debut in a pinch-hit situation. Waldschmidt delivered with a 96 MPH line drive single to left field on just the second pitch he saw — an 87 MPH cutter on the lower inside corner of the strike zone. It was a confident, sturdy swing. But Waldschmidt didn't care quite as much about the swing itself. "The really cool part about it was I was watching the swing back and the location of the pitch back on the iPad when I got back to the dugout, and the second half of the video is just the broadcast, and it panned to my family [in the stands] ," Waldschmidt said.…