His homer landed as far back in the bullpen as possible. Last year he hit a line drive over the Dunkin Donuts sign, which is above the bullpen. No way to compare the drives to home runs Harmon Killebrew hit at Griffith Stadium, though I think Harmon's went higher and deeper. The old bleachers stood behind a ten foot wall and climbed sharply to about 30 feet.In 1959, the LF line was about 350 feet. Still, if Harper does not have Killebrew power, that's OK. Frank Howard and Mickey Mantle are the only guys who hit farther, higher, and harder than Harmon. If I'm comparing Harper to those guys, he's among the biggest sluggers in modern baseball.