Bridlington 2nds put up a useful total which was not as high as would have been expected following a splendid 130-run partnership between Andy Clay and Elliot Traves.
But Bridlington never really capitalised as they looked on target for a 200-plus total at one stage.
Glaves (2-43) was the pick of Cayton’s bowlers.
Cayton set about their reply in good style, putting the bad balls away and keeping up with the required run rate, Riley and Pennock both passing their half centuries.
A good spell of spin bowling from Ben Ibson, well supported by Peter Bowtell, pulled things round and slowed the scoring rate with Ibson bowling Pennock for 56.
Reffold picked up a wicket and Traves bagged a couple as Bridlington tried to claw their way back but they were 20 or 30 runs short as Cayton got home by five wickets, despite Tom Hebden chipping in with a wicket with the scores level.
Bridlington booked their place in the semi-finals of the Evening League Division One Cup with a comfortable victory over Rudston and Kilham.
Steve Janney (54) batted superbly for Bridlington and Ben Traves (35) struck some lusty blows, while youngsters Harrison Male and Harry Burnhill both made good contributions as Bridlington totalled 147/5 from their allotted overs.
In Rudston’s reply, Harrison remained solid at one end, but unfortunately wickets tumbled regularly at the other end with four going cheaply and no one getting into double figures.
Clappison and Harrison did their best but were always behind the required run rate.
Clappison made 20 and Harrison had to retire on 35 with a pulled muscle, but the innings closed well short with McDougall on 10 not out.