Lotte announced on the 5th that they have signed Tsuyoshi Yamasaki infielder to a controlling player contract. The new number is "38"

Yamazaki commented through the team, "I am grateful for being given this opportunity and for being picked up by the team. I am also filled with gratitude to everyone who has supported me and cheered me on up to this point. From here on, I will do my best to do what I can to be a force for the team."

Yamazaki, who joined Lotte this season as a developmental player, made his debut after the transfer in the game against Hayate on April 25th, and then started at short stop for the first time since the transfer in the game against Orix Buffaloes 's minor league team on May 2nd. He started at starting line-up defense in the game against Hiroshima's minor league team on May 31st and in left field in the game against Rakuten Eagles 's minor league team on June 2nd, and hit starting line-up of 11 games from the game against The Giants league team on May 8th to the game against Hiroshima's minor league team on May 31st. hit in the game against Rakuten Eagles 's minor league team on June 2nd, but got two hit in the game against Rakuten Eagles 's minor league team on June 4th.

He has appeared in 19 minor league games so far, recording a batting average of .309, Home Run, and 4 RBI.