The Seagulls have used 27 senior talents in the Premier League this term – the joint-fourth-highest tally in the division and just three behind West Brom’s largest total of 30.
Naturally, there are some members of Graham Potter's squad who have been given more game time than others over the course of the campaign as a whole, but regardless of whether or not they get a run out, the club still needs to fork out on weekly wages – and in today's modern game, that’s by no means a small payout.
But which players are costing Premier League clubs to most to watch on from the sidelines week after week?
BettingOdds.com have crunched the numbers to take a closer look at which talents have established themselves as the most expensive unused substitutes in each top flight squad this term.
Click and scroll through their findings below...
![Games as an unused substitute: 6 Weekly Wage: £192,308 Amount earned as an unused substitute: £1.15m
(Photo by Alex Burstow/Getty Images)](https://www.sunderlandecho.com/webimg/b25lY21zOmU3YmJlZjY4LTBiOTItNGRhMi05YWNhLTY0OGMwMjA3YjM3ODo2NDM0MTE3YS0xMmU2LTRiMjYtYmU5ZS01NzBhMTNkYzZkMGE=.jpg?crop=3:2&width=800)
1. Arsenal - Willian
Games as an unused substitute: 6 Weekly Wage: £192,308 Amount earned as an unused substitute: £1.15m (Photo by Alex Burstow/Getty Images) Photo: Alex Burstow
![Games as an unused substitute: 22 Weekly Wage: £55,000 Amount earned as an unused substitute: £1.21m
(Photo by Laurence Griffiths/Getty Images)](https://www.sunderlandecho.com/webimg/b25lY21zOmY4MzVhMmU5LWMxODktNDVjZi1hNDAxLWJhZDg3M2M1NjI0ODoxZTQ0M2Y5OC0yM2Q0LTRiNDUtYWNkMi1mNjZjZDc1MmU0NDk=.jpg?crop=3:2&width=800)
2. Aston Villa - Bjorn Engels
Games as an unused substitute: 22 Weekly Wage: £55,000 Amount earned as an unused substitute: £1.21m (Photo by Laurence Griffiths/Getty Images) Photo: Laurence Griffiths
![Games as an unused substitute: 14 Weekly Wage: £45,000 Amount earned as an unused substitute: £630,000
(Photo by Clive Brunskill/Getty Images)](https://www.sunderlandecho.com/webimg/b25lY21zOmE3MDExZDViLTgwOGYtNDBlZi04ODIyLWM3NWJkNWViYjgxZDpiMjM3NWE4Ny00MGQxLTQwMTAtOWY3Ni0yYjdhY2Q0NDNmMWM=.jpg?crop=3:2&width=800)
3. Brighton - Davy Propper
Games as an unused substitute: 14 Weekly Wage: £45,000 Amount earned as an unused substitute: £630,000 (Photo by Clive Brunskill/Getty Images) Photo: Clive Brunskill
![Games as an unused substitute: 18 Weekly Wage: £35,000 Amount earned as an unused substitute: £630,000 (Photo by Alex Pantling/Getty Images)](https://www.sunderlandecho.com/webimg/b25lY21zOmFlM2ZjNDY2LTUxZjctNDA0NS05NmFlLTAxMDdjNTdjYjliMjplNjFlZDYyNC1hNzNlLTQ0YjUtYjRmNS0wYzk1ZWU0NTdiYjQ=.jpg?crop=3:2&width=800)
4. Burnley - Dale Stephens
Games as an unused substitute: 18 Weekly Wage: £35,000 Amount earned as an unused substitute: £630,000 (Photo by Alex Pantling/Getty Images) Photo: Alex Pantling