The Nationals' annual quest for a veteran power hitter starts anew / NATO chief throws first pitch for the Washington Nationals baseball team / Nationals make history of the worst kind in walk-off loss to the Rockies / Nationals' youth movement powers team to playoff fringes through 71 games / LOVERRO: Orioles, Nationals rivalry more about billionaires, bottom lines than ballparks, players / Nationals, Orioles have had a pretty friendly rivalry -- at least on the field / LOVERRO: The Nationals' future is inside the spring training clubhouse in the lockers on the right / LOVERRO: How the Padres, 50 years ago, almost became Washington's baseball team