The 2017 Pittsburgh Pirates season was the franchise's 136th season overall, 131st season as a member of the National League, and the 17th season at PNC Park. They failed to improve on their record from the previous season and finished fourth in their division and missed the playoffs for the second straight year.
Infielder Jung-ho Kang was found guilty by a South Korean court for his third offense of Driving under the influence, and as a result, the initial request for a work visa to enter the United States for the 2017 season was denied. He would miss the whole season with the Pirates. The Pirates recorded a 19–12 win–loss record in preseason spring training, the third best record in the Grapefruit League. In addition, two of their games finished tied and were therefore not included in the standings.
April 7 – In their home opener against the Atlanta Braves, the Pirates defeated the Braves 5–4. The Pirates would go on to win all three games of the series to sweep the Braves.
April 9 – Starling Marte hit a walk-off home run in the tenth inning to propel the Pirates to a 5–4 win and series sweep over the Braves.
April 12 – The Pirates were swept by the Cincinnati Reds following a 9–2 loss.
April 18 – Starling Marte was suspended 80 games after testing positive for nandrolone, a performance-enhancing substance; he will not be eligible to return until after the team's 93rd game on July 17 and is ineligible for postseason play if the team qualifies.
April 19 – The Pirates were swept following three straight 2–1 losses to the St. Louis Cardinals. The Pirates have been swept in three of the five series to date and have swept their opponent in the other two series to date.
April 22 – The Pirates lost to the New York Yankees 11–5 after beating them in the first game of the series. The series marks the first series of the year where the Pirates did not sweep their opponent nor did they get swept.
April 24 - the Pirates fielded the first baseball player to be born and raised in Lithuania, to reach the major leagues, Dovydas Neverauskas. In 1933, Joe Zapustas was the first Lithuanian-born player to play in MLB, as a member of the Philadelphia Athletics, however he grew up in Boston.
April 26 - The Pirates promoted South African Gift Ngoepe from the AAA Indianapolis Indians; making him the first African-born player in MLB history.
The Pirates finished the month with a win/loss record of 11–13, fourth in the NL Central at 2.0 games out of first.
July 18 – Starling Marte is reactivated after performance-enhancing drug suspension
August
August 6 – Sean Rodriguez, in his first game since being re-acquired by the Pirates a day earlier, hits a walk-off home run in the twelfth inning to give the Pirates a 5-4 victory over the San Diego Padres.
August 23 – Josh Harrison became the first player in MLB history to break up a no-hitter in extra innings with a walk-off home run. The home run was hit in the tenth inning, off of pitcher Rich Hill, to give the Pirates a 1-0 win over the Los Angeles Dodgers.
September
September 4 - Josh Bell broke the National League record for most home runs by a rookie switch hitter, hitting his 24th of the season off of Jake Arrieta, in a 12-0 Pirates' rout of the Chicago Cubs
September 5 - Longtime Pirates TV broadcaster Kent Tekulve announced his retirement, after the Pirates' 4-3 win over the visiting Chicago Cubs.
