Gonzalez (15-9) needed 39 pitches across 16 arduous minutes to record the game's first three outs, while his ERA rose from 2.75 to 2.96 just in that opening inning. The Pirates batted around as the lefty walked two batters, hit Jordan Luplow to force in a run with the bases loaded and allowed Max Moroff's three-run double along with Jacob Stallings' RBI single.
This came a day after 2016 NL Cy Young Award winner Max Scherzer left his last pre-playoffs start for Washington in the fourth inning after feeling something wrong with his right hamstring. At least Scherzer sounded optimistic about things Sunday, saying that an MRI exam showed he had only "tweaked" his muscle, not strained it.
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Gonzalez wound up going only 4 1-3 innings, allowing six runs, seven hits and three walks. It was his shortest appearance of a bounce-back season after going 11-11 with a 4.57 ERA in 2016 and part of a downward trend of late: Four of Gonzalez's last five starts lasted five innings or fewer. Only one other time all year did he depart that quickly, way back on May 3.
This time, Gonzalez left after serving up three consecutive hits in the fifth.
Just to introduce another element of uncertainty from a game that didn't matter for either team, Tanner Roark — slated to join Stephen Strasburg, Scherzer and Gonzalez in Washington's postseason rotation — entered in the sixth and promptly gave up two runs, three hits and a walk in his one-inning tuneup.
Hardly the preferred sort of preparation before facing the defending World Series champion Chicago Cubs in an NL Division series that starts in the nation's capital in less than a week.
Washington's hitters did not exactly look ready for prime time for much of the day, either: They went 0 for 7 with the bases loaded, including a strikeout and groundout by Trea Turner, and a groundout by Bryce Harper.
Angel Sanchez (1-0) earned his first big league win with two shutout innings in relief. George Kontos got the final out for his first save in 322 appearances in the majors.
Washington's Anthony Rendon hit a three-run shot off in the first, his 25th homer of the year. Michael A. Taylor added his 19th homer in the seventh; he was hit by a pitch on his right hand in the eighth.
There was a welcome sight for Washington in the seventh: Harper racing home from first — hair in full flow — on Adrian Sanchez's double, showing no signs of trouble from the hyperextended left knee that landed the 2015 NL MVP on the DL for 42 games.
Nationals manager Dusty Baker pulled regulars at the start of innings, letting them join teammates on the field before being substituted while spectators responded with ovations.
Right fielder Harper left in the top of the eighth, first baseman Ryan Zimmerman (.303, 36 homers, 108 RBIs a year after .218, 15, 46) in the fourth, third baseman Rendon in the fifth, second baseman Daniel Murphy in the sixth and left fielder Jayson Werth in the ninth.
In the last regular-season game of Werth's $126 million, seven-year contract, he was greeted by a standing ovation from some in the announced crowd of 36,652 before his first at-bat. A video montage played on the scoreboard above center field and fans held signs saluting him, including one that read, "Thank you, Jayson." Werth doffed his batting helmet to the crowd before his final at-bat. When he jogged off the field in the ninth, Harper met him outside the dugout for a hug.
LONG DAY'S NIGHT
The time of 4 hours, 22 minutes made this the longest nine-inning regular-season game, by time, in both Pirates and Nationals history.
The Nationals finished with a total home attendance of 2,524,980 in 2017, an average of 31,173.
Pirates: Season ends with a 75-87 record, slightly worse than last year's 78-83. Pittsburgh hasn't had this few wins since going 72-90 in 2010, manager Clint Hurdle's first season.
Nationals: Host the NL Central champion Cubs in Game 1 of the NLDS on Friday. Washington went 97-65, two more wins than a year ago and one short of the Nationals-best 98 in 2012.
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Copyright 2017 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
Copyright 2018 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.