| Men 100m Backstroke Swiming II World Championship 1975 Cali, Colombia - , 2-th July - Gold Medal: |
| Final | | time | | gap | L | ag | | 1. Roland Matthes |  East Germany | 58.15s | | | 3 | 24 | | 2. John Murphy |  United States | 58.34s | | +0.19s | 4 | 22 | | 3. Mel Nash | United States | 58.38s | | +0.23s | 4 | 20 | | 4. Lutz Wanja | East Germany | 58.43s | | +0.28s | 2 | 19 | | 5. Steve Pickell |  Canada | 58.63s | | +0.48s | 8 | 17 | | 6. Mark Tonelli |  Australia | 58.72s | | +0.57s | 7 | 18 | | 7. Klaus Steinbach |  West Germany | 59.12s | | +0.97s | 6 | 21 | | 8. Zoltan Verraszto |  Hungary | 59.28s | | +1.13s | 1 | 19 |
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Heats - Tuesday, 22nd July | | Best 8 times advanced to Final>. |
| Heat 4 | | time | | gap | L | ag | Rk | | 1. Mel Nash | United States | 58.39s | | - | - | 20 | 1. | | 3. Roland Matthes | East Germany | 58.71s | | +0.32s | - | 24 | 2. | | 4. Klaus Steinbach | West Germany | 58.79s | | +0.40s | - | 21 | 3. | | 16.Bodo Schlag | West Germany | 1:01.57 | | +3.18s | - | _ | 4. | | 17.Conrado Porta |  Argentina | 1:02.10 | | +3.71s | - | 17 | 5. | | 20.Igor Omelchenko |  Soviet Union | 1:02.95 | | +4.56s | - | 15 | 6. |
| Heat 3 | | time | | gap | L | ag | Rk | | 2. John Murphy | United States | 58.49s | | +0.10s | - | 22 | 1. | | 6. Mark Tonelli | Australia | 59.10s | | +0.71s | - | 18 | 2. | | 10.Romulo Arantes Filho |  Brazil | 1:00.30 | | +1.91s | - | 18 | 3. | | 14.Jim Carter |  Great Britain | 1:00.94 | | +2.55s | - | 18 | 4. | | 18.Krasimir Petrov |  Bulgaria | 1:02.18 | | +3.79s | - | _ | 5. | | 19.Gary Abraham | Great Britain | 1:02.21 | | +3.82s | - | 16 | 6. | | 24.Lorenzo De La Torre |  Colombia | 1:08.90 | | +10.51s | - | _ | 7. |
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| Heat 2 | | time | | gap | L | ag | Rk | | 8. Steve Pickell | Canada | 59.75s | | +1.36s | - | 17 | 1. | | 9. Santiago Esteva |  Spain | 1:00.08 | | +1.69s | - | 23 | 2. | | 11.John Van Buren | Canada | 1:00.66 | | +2.27s | - | _ | 3. | | 13.Karim Ressang |  Netherlands | 1:00.90 | | +2.51s | - | 19 | 4. | | 22.Tung-Hsiung Hsu |  Taiwan | 1:04.21 | | +5.82s | - | 20 | 5. | | 23.Enrique Ledesma Jr |  Ecuador | 1:06.37 | | +7.98s | - | 16 | 6. | | -. Enrico Bisso |  Italy | DSQ | | - | - | 19 | 7. |
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| Heat 1 | | time | | gap | L | ag | Rk | | 5. Lutz Wanja | East Germany | 58.86s | | +0.47s | - | 19 | 1. | | 7. Zoltan Verraszto | Hungary | 59.25s | | +0.86s | - | 19 | 2. | | 12.Lapo Cianchi | Italy | 1:00.79 | | +2.40s | - | _ | 3. | | 15.Robert Rudolf | Hungary | 1:01.27 | | +2.88s | - | 18 | 4. | | 21.Helmut Podolan |  Austria | 1:04.15 | | +5.76s | - | 19 | 5. | | 25.Jose Luis Yepez | Ecuador | 1:09.71 | | +11.32s | - | _ | 6. |
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