On June 6, 2018, he pitched against the Hokkaido Nippon-Ham Fighters in an Interleague play (NPB) and recorded his first win.[4] In 2018 season, he finished the regular season with 8 games pitched, a 1–0 win–loss record, a 6.14 ERA, and a 21 strikeouts in 14.2 innings. In 2018 season, he finished the regular season with 8 games pitched, a 1–0 win–loss record, a 6.14 ERA, and a 21 strikeouts in 142⁄3 innings.
In 2019 season, he pitched in 4 games in the Central League.
In 2020 season, he never got a chance to pitch in the first league. On November 4, 2020, the Carp announced he would be released.[5]
On May 9, 2021, he achieved a no-hitter in an interleague match against the Fukuoka SoftBank Hawks 3rd squad. This later became the notch for the Hawks to acquire Fujii.[7]
In 2021 season, he finished the regular season with 22 games pitched, a 11–3 win–loss record, a 1.12 ERA, and a 180 strikeouts in 145 innings.[8]
Fukuoka SoftBank Hawks
On December 14, 2021, Fujii signed with the Fukuoka SoftBank Hawks a 5.5 million yen contract as a developmental player.[8][9]
On March 22, 2022, he re-signed a 6.5 million yen contract as a registered player under control.[10] He pitched as a relief pitcher in the match against the Hokkaido Nippon-Ham Fighters on March 27, and won the NPB for the first time in four years.[11] On June 1, he recorded his first save against the Yomiuri Giants in an Interleague play (NPB).[12] Since then, he has contributed to the team as a setup man, finished the regular season with 55 Games pitched, a 5–1 win–loss record, a 1.12 ERA, a 22 holds, a 3 saves, and a 81 strikeouts in 561⁄3 innings.
From the 2023 season, Fujii became a starting pitcher, and became the winning pitcher for the first time as a starting pitcher against the Chiba Lotte Marines on April 1.[13] He was then part of the starting pitching rotation, but on June 11, he was diagnosed with a left internal oblique muscle strain and headed for rehabilitation.[14] But he returned on July 25.[15] After that, he contributed to the team as a setup man. Fujii finished the regular season with a 34 Games pitched, a 5-3 Win–loss record, a 2.33 ERA, a 9 holds, and a 84 strikeouts in 692⁄3 innings.
^In the NPB, in addition to the 70 registered players under management (active roster of players), each team can have developmental squad players for the purpose of improving their baseball skills and training manners. They aim to be promoted to registered players under management within the 3-year contract period (non-tender FA players and contract expired players renew their contract every year).
