| Guillermo Báez | |
| Fullname: | Guillermo Osvaldo Báez Astudillo |
| Birth Place: | Valparaíso, Chile |
| Position: | Defender |
| Youthclubs1: | Santiago Wanderers |
| Years1: | 1924–1926 |
| Clubs1: | Santiago Wanderers |
| Years2: | 1927–1929 |
| Clubs2: | Unión Deportiva Española |
| Years3: | 1930 |
| Clubs3: | Everton |
| Years4: | 1931 |
| Years5: | 1932–1935 |
| Years6: | 1936–1937 |
| Clubs6: | Santiago Wanderers |
| Years7: | 1937–1938 |
| Clubs7: | Unión Española |
| Years8: | 1939–1943 |
| Clubs8: | Green Cross |
| Manageryears1: | 1949–1950 |
| Managerclubs1: | San Luis |
| Manageryears2: | 1958 |
| Managerclubs2: | Ñublense |
| Manageryears3: | 1959 |
| Managerclubs3: | Rangers |
| Manageryears4: | 1964 |
| Managerclubs4: | Lister Rossel |
| Manageryears5: | 1971 |
| Managerclubs5: | Naval |
| Manageryears6: | 1975–1976 |
| Managerclubs6: | Deportes Concepción |
| Manageryears7: | 1980 |
| Managerclubs7: | Curicó Unido |
Guillermo Osvaldo Báez Astudillo (1909 - unknown) was a Chilean football manager and player who played as a defender.
Born in Valparaíso, Báez stood out as a player of Santiago Wanderers in the 1920s and 1930s.[1]
Before the professional era in Chilean football, he also played for Unión Deportiva Española, Everton and . Abroad, he played for in Cuba.[1]
In the Chilean Primera División, he played for Santiago Wanderers,[2] Unión Española[3] and Green Cross.[1]
Following his retirement, he performed as a football referee in the Chilean football.[4] [5] [6]
As a football coach, he led many clubs in the Chilean football. A year before Ñublense joined the professional football, he led them in the 1958 regional championship of Concepción.[7]
In the Chilean Segunda División, he coached clubs such as Lister Rossel, becoming the runner-up in 1964[8] [9] and Naval de Talcahuano, winning the 1971 league title.[10] [11]
In the Chilean Primera División, he coached clubs such as Rangers and Deportes Concepción, becoming the runner-up in the 1975 season with Vicente Cantatore as assistant.[12] [13]
His older brother, Telésforo, was also a footballer who represented the Chile national team in the 1919 South American Championship.[14] [1]
He was nicknamed Gallego (Galician).[1] [7] [8]
At the same time he was a player of Green Cross, he worked as a bus driver.[15]
Naval