| LAYUN | Miguel ..... , 2013-20 Mexico and 2014-15 Watford defender (5) |
| DOYLEY | Lloyd ...... , 2013-14 Jamaica and 2001-15 Watford defender (6) |
| JAMES | Rangers, 2009-14 Newcastle and 2014-15 Wigan defender (5) |
| AITON | Paul ..... , 2012-13 Wakefield and 2014-15 Leeds hooker (5) |
| KVIST | William ..... , 2007-18 Denmark and 2014-15 Wigan midfielder (5) |
| ZIGIC | Nikola ..... , 2006-11 Serbia, 2010-14 and 2014-15 Birmingham forward (5) |
| WEEPU | 2004-13 New Zealand and 2014-15 London Welsh scrum-half (4,5) |
| IKEME | Brown ..... , 2010-16 Nigeria and 2014-15 West Brom forward (5) |
| DARYL | 2012-18 Netherlands and 2016-20 Watford defender (5,7) |
| NUHIU | Atdhe ....., SC Rheindorl Altach, 2017-20 Kosovo and 2013-20 Sheffield Wednesday forward (5) |
| BIAGI | George ..... ,2014-18 Italy and 2013-20 Zebne lock (5) |
| SARTO | Leonardo ..... , Rugby Rovigo Delta and 2013-20 Italy wing (5) |
| CAMPS | Callum ..... , Stockport and 2013-20 Rochdale midfielder (5) |
| NAJAR | Honduras and 2013-20 Anderlecht midfielder (5) |
| AKERS | Vic ..... , 1975-76 Watford defender; 1987-2009 Arsenal Ladies manager (5) |
| KAYKY | Watford defender signed from Fluminense last month (5,7) |
| TERRY | Steve ..... , 1979-88 Watford defender; 1984 FA Cup final runner-up (5) |
| NIALL | Hull KR, 2013-20 Salford Red Devils and 2021-23 Castleford Tigers full-back (5,6) |
| HOEDT | Wesley ..... , Watford defender (5) |
| REINA | Pepe ..... , 2005-17 Spain and 2005-14 Liverpool, 2014-15 Bayern Munich, 2015-18 Napoli, 2018-20 Milan and 2020-22 Lazio goalkeeper between spells at Villarreal (5) |
