Gareth Southgate and Jimmy Floyd Hasselbaink were presented with their official Legacy Number certificates on Sunday.
The former Boro favourites are stationed at Rockliffe for a training camp with the England national team as preparations begin for Euro 2024, with Hasselbaink (#731) a part of boss Southgate's (#701) coaching team.
Following extensive research from volunteer historians among the Boro-supporting community, an official Legacy Number has been assigned to each and every senior men’s player to feature in a competitive fixture for the club since it permanently turned professional in 1899.