August 16 vs Lotte at Sapporo Dome – Masui notched the 100th save of his career. He became the twenty-eighth player in NPB history to record 100 saves and the fourth player in NPB history to record 100 saves and 100 holds (100 saves, 127 holds). He joined Hisashi Takeda (167) and Micheal Nakamura (102) as the only players in Nippon Ham Fighters’ franchise history to record 100 saves.
Source: Nikkan Sports 8/17/2017
June 29 vs Nippon Ham at Sapporo Dome – Masui recorded a save against the Nippon Ham Fighters and joined Yutaka Enatsu, Marc Kroon, and Dennis Sarfate as the only pitchers in NPB history to record a save against all twelve teams.
Masui currently has wins against ten NPB teams. He could become the first player in NPB history record saves and wins against all twelve NPB teams.
August 24 vs Lotte at ZOZO Marine – Masui notched his thirtieth save of the year and became joined Marc Kroon and Dennis Sarfate as the only pitchers in NPB history to record thirty saves in a season with more than one team.