| Roles | Non-starter |
|---|---|
| Sex | Male |
| Full name | Lars Johannes Madsen•Brock |
| Used name | Johannes•Brock |
| Born | 12 December 1898 in Frederikshavn, Nordjylland (DEN) |
| Died | 3 March 1961 (aged 62 years 2 months 22 days) in Århus (Aarhus), Midtjylland (DEN) |
| Affiliations | Thisted IK |
| NOC |  Denmark |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1924 Summer Olympics | Athletics | DEN |
Johannes Brock | |||
| 100 metres, Men (Olympic) | ||||||
| 200 metres, Men (Olympic) | ||||||
| 400 metres, Men (Olympic) |
