Webster signed a two-year hold with the breakers successful July, but was released from his declaration by "mutual consent", according to a squad statement.
The 26-year-old defender is the archetypal jock to suffer a woody implicit a vaccination stance successful an Australian nonrecreational sporting code.
Despite having his declaration torn up, Breakers proprietor Matt Walsh said helium respected Webster's determination to stay unvaccinated, and near the doorway unfastened for him to instrumentality successful the future.
"Tai was astonishing for america past twelvemonth and we privation him the implicit best. I afloat enactment each player's state of prime successful regards to the vaccine," Walsh said successful the squad statement.
"The nine volition support the doorway unfastened for Tai, but unluckily we are surviving successful bonzer times and without being vaccinated helium volition not person state of question which would let him to play for america this season."
The NBL itself has not yet made vaccinations mandatory for its players, but league commissioner Jeremy Loeliger warned earlier this period that unvaccinated players would look difficulties travelling betwixt definite states.
"At this point, we are not going to mandate vaccinations for players, coaches and staff, but we volition proceed to amended our radical and volition powerfully urge it," Loeliger said successful a connection connected September 9 aft a Sydney Kings subordinate contracted the virus.
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"It whitethorn beryllium that those who don't get vaccinated won't beryllium capable to question betwixt states and countries, oregon adjacent participate definite venues, and truthful won't beryllium capable to enactment successful immoderate games erstwhile the play begins.
"Individuals that determine not to get vaccinated could beryllium subjected to antithetic rules depending connected assorted authorities protocols and restrictions."