Rakuten Eagles announced on the 25th infielder Rui Muneyama underwent an examination at a hospital in Tokyo and was diagnosed with a left wrist cartilage (TFCC) injury. The recovery period is unknown, but it is generally expected to take 1 to 3 months to return to competition. If the injury is serious, his return will not only be in jeopardy for the opening three-game series against Orix Buffaloes (Kyocera Dome) starting on the 26th, but also for the first half of the season.

Muneyama played in 17 exhibition games, batting .250 with 3 RBI and 2 stolen base. He was injured in the game against The Giants on the 20th (at Tokyo Dome).