PHOENIX (Interstat) — Brandon Lowe homered and Ryan O’Hearn and Spencer Horwitz delivered two-out RBI singles in the fifth inning as the Pittsburgh Pirates defeated the Arizona Diamondbacks 4-2 on Thursday. Mitch Keller (4-1) allowed two runs on four hits over six innings, striking out four, and retired 10 consecutive batters after Corbin Carroll’s solo home run in the third. Gregory Soto pitched a scoreless ninth for his third save. Zac Gallen (1-3) took the loss, yielding four runs on six hits in six innings while striking out five. Pittsburgh compiled seven hits, including Lowe’s three, and Arizona had five. The Pirates grounded into no double plays; Arizona grounded into two. Pittsburgh scored once in the first, twice in the fifth and once in the sixth. Arizona scored in the first and third. The Pirates, now 21-17, won two of three in the series at Chase Field before a crowd of 21,827. The game lasted 2 hours, 33 minutes.