The first month of B.LEAGUE PREMIER has reached a useful injury-list checkpoint, but it is not a return announcement. Matt Costello of the Chiba Jets and Akil Mitchell of Nagasaki Velca both have 29 October listed as their no-re-registration deadline in the league's 28 October injury register. Neither player's appearance on that register is evidence that he has been cleared, removed from the list or selected for the weekend. That distinction matters more than the date itself as both clubs prepare for games on 31 October and 1 November.
The B.LEAGUE's official injury-list notice, updated 28 October, still lists Costello and Mitchell among the registered players. The league explains that an injured player cannot be re-registered for 30 days after listing, and that re-registration requires the club to apply for removal after the restricted period. In other words, reaching the listed date is an administrative milestone, not an automatic change in playing status. At the time of this report, the league notice does not document either player's removal.
Chiba: Costello's foot injury and a replacement already in place
Chiba's 29 September club announcement identified Costello's injuries as damage involving the intermetatarsal ligament between the fourth and fifth bones of his left foot, together with peroneal tendon inflammation. The Jets estimated a recovery period of four to six weeks. The league register records his 29 September injury-list registration and 29 October no-re-registration deadline. Those two pieces of information should not be collapsed into a prediction that he will be available immediately: a four-to-six-week recovery estimate and a 30-day administrative restriction answer different questions.
The Jets have also already made a roster response. On 7 October, Chiba announced the signing of forward LG Gill, explicitly linking his arrival to Costello's injury-list registration. Gill's signing is confirmed; a subsequent decision about how Chiba will manage its frontcourt when Costello is healthy is not. It would be premature to announce a rotation reshuffle or a return-game minutes allocation without a fresh club statement and an actual team sheet.
The next practical test is imminent. Chiba's official home-game information lists Toyama Grouses as the opponent on Saturday 31 October and Sunday 1 November. Those dates make the injury-list update timely, but they do not establish that Costello will play in either fixture. The club's later registration notice, match squad and game participation should be checked in that order before making a selection claim.
Nagasaki: Mitchell's hamstring timeline reaches the same checkpoint
Nagasaki's 29 September announcement states that Mitchell was injured against Shimane on 23 September and diagnosed with a right biceps femoris injury, part of the hamstring muscle group. The club gave a four-week recovery estimate and registered him on 29 September, with 29 October listed as the removal eligibility date. That original estimate is historical medical guidance, not a fresh fitness clearance. The 28 October league register still includes him, so a claim that he has already returned would outrun the published evidence.
Nagasaki's official B.LEAGUE club schedule has a pair of away fixtures against Kobe Storks on 31 October and 1 November. The sequence creates a clear reporting question: will Nagasaki formally remove Mitchell from the list and include him in the travelling group? Until the club confirms those steps, the responsible description is a player approaching a registration checkpoint, not a confirmed reinforcement for Kobe.
Why the two cases should not be treated as identical
The shared deadline is a coincidence of registration dates, not proof of equivalent recoveries. Costello's club cited a left-foot ligament issue and tendon inflammation with a four-to-six-week estimate. Nagasaki described a right-hamstring injury with a four-week estimate. Different tissues, individual rehabilitation progress and team selection decisions make a single return forecast inappropriate. The league's injury list is a formal roster-status record; it is not a daily medical bulletin, and a player's absence from a future list would still not, by itself, guarantee game minutes.
There is also a difference in the confirmed team response. Chiba publicly tied Gill's signing to Costello's registration, providing a documented interim personnel decision. Nagasaki's original announcement establishes Mitchell's injury and registration timeline, but the documents reviewed here do not support naming a particular beneficiary of his absence or promising a particular role on his return. Assigning minutes or future production to either side would be inference unsupported by the available primary sources.
The next verified update to watch
For readers following B.PREMIER, the useful checklist is straightforward: a new league injury-list entry or removal, a dated club statement, the official game-day squad, and finally the actual box score. A 29 October administrative date can start that reporting process; it cannot finish it. The distinction is especially important in the opening season of a restructured league, when injury news and roster announcements can travel quickly without the full context of eligibility rules.
As at 4:00 am ACDT on Thursday 29 October 2026 (2:30 am JST), Costello and Mitchell remain listed in the latest 28 October official injury register reviewed for this article. Neither is confirmed available for the 31 October–1 November fixtures. This is original B.PREMIER basketball reporting, not a claim that Buckets operates a B.PREMIER fantasy competition or provides live scoring, waiver or projection services for the league.
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