At the time, he led the NL with 26 home runs and batted .277/.360/.572 (avg/on base/slugging). He also participated in the Home Run Derby but lost by one home run in the first round to New York Yankees catcher Gary Sánchez. Named NL Player of the Week on August 13, Stanton had hit his 250th career home run earlier in the day versus the Colorado Rockies. For the week, he generated a major league-leading six home runs and 11 RBI and averaged 1.037 SLG and 1.416 OPS. While playing the San Francisco Giants on August 14, Stanton hit his 43rd home run, setting the Marlins franchise record for most home runs in a season, which surpassed Gary Sheffield's mark of 42 set in 1996. Stanton hit the home run versus Ty Blach and had homered in five consecutive games, setting another franchise record. Over a span of 35 games through August 15, Stanton erupted for 23 home runs, including in six games in a row. Only Sammy Sosa (1998) and Barry Bonds (2001) had hit more in a 35-game span. On August 27, Stanton became the first player since Chris Davis in 2013 to hit 50 home runs in one season. Stanton also became the sixth player in MLB history to reach 50 home runs before the end of August. During the August 29 game versus the Washington Nationals, he hit his 18th home run of the month, tying Rudy York for the most home runs in August, set in 1937. Stanton won the NL Player of the Month Award for August, leading the major league with 18 home runs, 37 RBI, 28 runs scored and .899 slugging percentage. Stanton hit his 57th home run and drove in four runs on September 23 versus Arizona, giving him 125 RBIs on the season, and passing Preston Wilson's franchise record of 121 set in 2000. Enhancing the cachet of Stanton's historic season, ESPN ranked Marlins Park as one of the six most difficult stadiums in which to hit a home run in 2017. He finished the season with 59 home runs and 132 RBI, and batted .281. He yet again hit the ball with the highest exit velocity in the major league all season, at 120.1 miles per hour. He also had the highest ISO (Isolated Power) of all MLB players in 2017, at .350. He was also the first player in the National League since Prince Fielder in 2007 to hit 50 or more home runs in a season.