Firpo has a contract offer on the table at Elland Road, as does Sam Byram, but as of yet the versatile full-back is also yet to sign on the dotted line and so will become a free agent at midnight. The Whites trio each joined in very different circumstances but will all leave promotion heroes, if indeed new deals are not signed.
But Leeds are not the only Premier League team waving off first-team squad members today, with more than 40 players set to become free agents as of tomorrow - including two reported Elland Road targets. Take a look below to see who can now be snapped up for nothing.
Position: Left-back | Released by: Arsenal | Joined: Celtic
1. Kieran Tierney
Position: Left-back | Released by: Arsenal | Joined: Celtic | Arsenal FC via Getty Images
Position: Midfielder | Released by: Arsenal | Joined: N/A
2. Thomas Partey
Position: Midfielder | Released by: Arsenal | Joined: N/A | AFP via Getty Images
Position: Midfielder | Released by: Arsenal | Joined: Flamengo
3. Jorginho
Position: Midfielder | Released by: Arsenal | Joined: Flamengo | Arsenal FC via Getty Images
Position: Goalkeeper | Released by: Aston Villa | Joined: N/A
4. Robin Olsen
Position: Goalkeeper | Released by: Aston Villa | Joined: N/A | Getty Images
Position: Centre-back | Released by: Brentford | Joined: N/A
5. Ben Mee
Position: Centre-back | Released by: Brentford | Joined: N/A | Getty Images
Position: Midfielder | Released by: Brentford | Joined: N/A
6. Josh Dasilva
Position: Midfielder | Released by: Brentford | Joined: N/A | Ryan Pierse/Getty Images