Complex sentence: He completed training with the Castleford Tigers first-team squad and made his debut in a reserve game against York City Knights, but Castleford announced that they would not be offering him a contract.
Split into simpler sentences: He completed training with the Castleford Tigers first-team squad and made his debut in a reserve game against York City Knights. However, Chambers' tentative exploits into rugby league proved short-lived as Castleford announced that they would not be offering him a contract.