100 m Backstroke, Men
| Competition | 1977 USA Swimming National Championships (Outdoor/LCM) |
|---|---|
| Venue |
Mission Viejo, California
 USA
|
| Held | 20 August 1977 |
| Status | Medal |
| Competitors | 8 |
| Countries | 3 |
Mission Viejo, California / Marguerite Aquatic Center / long-course metric (50m)
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Mark Tonelli Mission Viejo Nadadores |
 AUS |
57.80 | ||
| 🥈 | Bob Jackson Camden, NJ |
USA |
57.84 | ||
| 🥉 | Dan Harrigan Beach Swim Club |
USA |
58.03 | ||
| 4 | Cress Templeton Riviera Club, Indianapolis, IN |
USA |
58.25 | ||
| 5 | Rômulo Arantes Cummins Engine Swim Club |
 BRA |
58.55 | ||
| 6 | Mark Kerry | AUS |
59.05 | ||
| 7 | Donald Hornby Best Us |
USA |
59.37 | ||
| 8 | Marc Foreman Gatorade Swim Club |
USA |
59.59 |