The list
| # | Player | Born | Celtic | Middlesbrough |
|---|---|---|---|---|
| 1 | Kelechi Iheanacho | 1996 | 2025–2026 | 2025 |
| 2 | Mark Viduka | 1975 | 1998–2000 | 2004–2007 |
| 3 | Juninho Paulista | 1973 | 2004–2005 | 1995–1997, 1999–2000, 2002–2004 |
| 4 | Patrick Roberts | 1997 | 2016–2018 | 2020–2021 |
| 5 | Ben Gannon-Doak | 2005 | 2021–2022 | 2024–2025 |
| 6 | Chris Killen | 1981 | 2007–2010 | 2010 |
| 7 | Scott McDonald | 1983 | 2007–2010 | 2010–2013 |
| 8 | Stephen McManus | 1982 | 2003–2010 | 2010–2013 |
| 9 | Tony Mowbray | 1963 | 1991–1995 | 1982–1991 |
| 10 | Chris Morris | 1963 | 1987–1992 | 1992–1997 |
| 11 | Derek Whyte | 1968 | 1985–1992 | 1992–1997 |
| 12 | Barry Robson | 1978 | 2008–2010 | 2010–2012 |
| 13 | Bobby Murdoch | 1944 | 1959–1973 | 1973–1976 |
| 14 | Neil Mochan | 1927 | 1953–1960 | 1951–1953 |
| 15 | Willie Fernie | 1928 | 1948–1961 | 1958–1960 |
| 16 | Willo Flood | 1985 | 2009–2010 | 2010–2011 |
| 17 | Ben Hutchinson | 1987 | 2008–2011 | 2005–2008 |
| 18 | Joe Cassidy | 1872 | 1893–1895 | 1901–1906 |
| 19 | Rolando Ugolini | 1924 | 1944–1948 | 1948–1957 |
| 20 | Donald McLeod | 1882 | 1902–1908 | 1908 |
| 21 | John Hewitt | 1963 | 1989–1992 | 1991–1992 |
| 22 | Ronnie Coyle | 1964 | 1984–1987 | 1987 |
| 23 | Willie Falconer | 1966 | 1994–1996 | 1991–1993 |
| 24 | Andy Payton | 1967 | 1992–1993 | 1991–1992 |
| 25 | John McKay | 1898 | — | — |
| 26 | Rab Macfarlane | 1875 | 1901–1902 | 1902–1904 |
Which way they moved
- Celtic first, then Middlesbrough: 18
- Middlesbrough first, then Celtic: 6
Test yourself
Three more club pairs: name one player for each.
Play it
In Who Played Both you and your opponent secretly pick a club each. If the clubs are Celtic and Middlesbrough, the first to name one of the players above in 15 seconds wins the round.
More pairs with Celtic
- Aston Villa – Celtic 30 players
- Celtic – Sunderland 29 players
- Celtic – Manchester City 27 players
- Celtic – Norwich City 27 players
- Celtic – Southampton 25 players
- Celtic – Leicester City 25 players
- Celtic – Coventry City 24 players
- Celtic – Liverpool 23 players
Celtic: every club it shares players with
More pairs with Middlesbrough
- Middlesbrough – Sunderland 44 players
- Cardiff City – Middlesbrough 43 players
- Middlesbrough – Sheffield United 42 players
- Middlesbrough – Newcastle United 41 players
- Leeds United – Middlesbrough 40 players
- Aston Villa – Middlesbrough 40 players
- Middlesbrough – Stoke City 36 players
- Hull City – Middlesbrough 34 players
Middlesbrough: every club it shares players with
Source: Wikidata (CC0), Wikipedia club articles and player infoboxes (years at each club). Youth spells and appearances that look unplayed are left out; volunteer-kept records can contain gaps or errors.