Tsuyoshi Wada had surgery to remove loose cartilage in his left elbow at a hospital in Kanagawa earlier today. He might need about three months for a full recovery.
[UPDATE 5/31 @ 2:31am]
Wada’s stitches were removed on May 29. He began rehab workouts at the Chikugo facilities on May 30. His first day included some running and trunk strengthening exercises. Assuming no major setbacks, he could begin playing catch in about a month (late-June) and toss a bullpen session in roughly two months (late-July). Wada would like to be ready to return to the active roster in September or October.
[UPDATE 6/22 @ 9:35pm]
Wada started playing catch on June 22 (distance over ten meters). He hopes to be ready to toss first bullpen session in about a month.
Source: Nikkan Sports 6/22/2017
[UPDATE 7/14 @ 9:25pm]
Wada started playing catch at a distance of about seven meters on July 13. He will be re-examined at a hospital in Kanagawa early next week. If everything checks out, he will toss a bullpen session.
Source: Nikkan Sports 7/14/2017
[UPDATE 7/20 @ 10:15pm]
Wada resumed bullpen sessions on July 20. He threw eleven pitches to a standing catcher and fifteen to a squatting catcher. He threw nothing but fastballs. This was his first session in about two months.
[UPDATE 7/27 @ 1:04am]
Wada threw thirty-seven pitches in the bullpen on July 25. He mixed in other pitches like curveballs, sliders, and change-ups. He was scheduled to throw thirty-five, but added two more because he was unhappy with his last few pitches.
Wada threw twenty-five pitches on July 23. He is slated to toss about forty-five pitches in front of Kimiyasu Kudo during Ichi-gun practices at YafuOku Dome on July 28. He is hoping to pitch in his first rehab game at Ni-gun when he gets up to sixty to seventy pitches.
Source: Nikkan Sports 7/26/2017
[UPDATE 7/29 @ 11:47am]
Wada participated in Ichi-gun practices at YafuOku Dome. He threw about fifty pitches, including breaking balls, in the bullpen. It was his fourth session since he went under the knife.
Wada could be ready to play in his first rehab game some time around mid-August. That could mean he might be ready to rejoin the active roster in September.
[UPDATE 7/29 @ 7:04pm]
Wada is scheduled to throw about sixty pitches in the bullpen on July 30. Assuming no issues, he should be able to toss a batting practice session some time next week.
Source: Nikkan Sports 7/29/2017
[UPDATE 8/6 @ 12:02am]
Wada pitched in a batting practice scrimmage on August 5. He face Kyle Jensen, Shogo Omoto, and Kosuke Moriyama. He threw forty-three pitches, faced nine batters, allowed two could-be hits, walked one, and struck out three. Assuming no issues with his left elbow, he could be in a Ni-gun rehab game on August 12 against Hiroshima. There is a chance he could rejoin the active roster before the end of this month.
Source: Sports Hochi 8/5/2017
[UPDATE 8/12 @ 8:50pm]
Wada started a Ni-gun game against Hiroshima today. He did not allow a run over 2.1 innings of work. He threw thirty-seven pitches, faced eight hitters, allowed one hit, struck out three, and topped out at 142km/h. This was his first game since April 7.
Wada is slated to make his next start at Ni-gun on six days of rest on August 19 against Chunichi (assuming no issues). He is expected to throw seventy to eighty pitches (he was scheduled to throw forty today).