Martinez hit four home runs versus the Los Angeles Dodgers to become the 18th major leaguer and first Diamondbacks player to hit four home runs in the same game. Each home run came in four consecutive at-bats against four different pitchers. As the Dodgers collectively obtained three hits, Martinez' achievement of four home runs made him the first with that distinction to realize more home runs than the opposing team had totals hits. The first came in the fourth inning; he then hit a home run in each of the seventh, eighth, and ninth innings, becoming the first player in the modern era to do so. He is the most recent player to hit four home runs in a game, doing so less than three months after Scooter Gennett hit four while playing for the Cincinnati Reds. Martinez won the following National League (NL) Player of the Week Award—ending September 10—after batting .429, seven total home runs, and 11 RBI. On September 17, Martinez recorded his 40th home run of the season, doing so against the San Francisco Giants, and reaching the milestone for the first time in his career. He became just the fifth player to reach 40 home runs while playing for two different teams in one season. He was awarded the NL Player of the Week award for the period ending September 17, during which he batted .435 with three home runs, six RBIs, and eight runs scored over six games. He became the first NL player to win consecutive Player of the Week Awards since Bryce Harper in May 2015. It was Martinez' fourth weekly honor of 2017, making him the first player with four in the same season since the award was created in 1974. He hit his 16th home run of the month of September on September 28, tying Ralph Kiner in 1949 for the National League record for the month. Martinez was named NL Player of the Month for September, playing 24 games and hitting 16 home runs, .404 (40-for-99), eight doubles, 24 runs scored, and 36 RBIs. In 62 games with Arizona, Martinez hit .302 with 29 home runs and 65 RBIs. His combined achievements with Detroit and Arizona in 2017 included a .303 batting average in 119 games played and new career-highs in each of 45 home runs, 104 RBI, .376 OBP, and eight intentional walks. Other career highs of .690