A former contestant on The Block NZ has been convicted of attacking a former boss who sacked him

Dylan Cossey, nicknamed "Big Dyls" on the 2016 TV series, headbutted Mark Roil three times at a rugby match at Napier's McLean Park last year.

Roil, had previously employed Cossey in 2018 but made him redundant when the business started to slow down.

Cossey was charged with assault with intent to injure, the charge was later downgraded to common assault and he pleaded guilty in the Napier District Court in April.

He'll come up for sentence if called upon within a year, which is the equivalent of a good behaviour bond.

If he's convicted of another matter within a year he can be resentenced for the assault.