Sykehouse did extremely well to reach the final after beating Fenwick in the quarter-final with just eight men.
They then fielded nine men for their semi-final against Askern Welfare and still won in convincing fashion.
Sykehouse raised a full complement for the final but one man came to the fore as Bellwood’s brilliant hat trick de-railed Outcasts’ run chase.
Luke Cockburn (27), Ryan Capstick (26) and Doncaster Knights youngster Will Holling (21) got Sykehouse up to 121-5 from their 20 overs.
Matthew Teal (39) threatened to take Outcasts close but Bellwood’s hat trick reduced the Crowle club from 66-3 to 66-6 and they closed on 104-9.
Bellwood finished with figures of 4-15 from four overs.