ATLANTA — Adam LaRoche led off the 15th inning with a homer and the Washington Nationals recovered after Stephen Strasburg was ejected and after blowing a two-run lead in the ninth to beat the Atlanta Braves 8-7 on Saturday night. Strasburg was ejected in the second inning. He hit Justin Upton with a pitch in the first and was tossed after throwing two straight pitches behind Andrelton Simmons' back.