(CNN)  -- The National Football League has indefinitely suspended Atlanta Falcons quarterback Michael Vick without pay, officials with the league said Friday. NFL star Michael Vick is set to appear in court Monday. A judge will have the final say on a plea deal. Earlier, Vick admitted to participating in a dogfighting ring as part of a plea agreement with federal prosecutors in Virginia. "Your admitted conduct was not only illegal, but also cruel and reprehensible. Your team, the NFL, and NFL fans have all been hurt by your actions," NFL Commissioner Roger Goodell said in a letter to Vick.
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NEW: NFL chief, Atlanta Falcons owner critical of Michael Vick's conduct
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NFL suspends Falcons quarterback indefinitely without pay
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Vick admits funding dogfighting operation but says he did not gamble
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Vick due in federal court Monday; future in NFL remains uncertain
@placeholder also agreed that "collective efforts" by him and two others caused the deaths of at least six dogs.