The final of the Men's Discus Throw event at the 2003 Pan American Games took place on Friday August 8, 2003. Jason Tunks won the first discus gold for Canada in the history of the Pan American Games.
Medalists edit
| Gold | Jason Tunks Canada
|
| Silver | Frank Casañas Cuba
|
| Bronze | Lois Maikel Martínez Cuba
|
Records edit
| World Record |  Jürgen Schult (GDR) |
74.08 m | June 6, 1986 | Neubrandenburg, East Germany
|
| Pan Am Record | Luis Delís (CUB) |
67.32 m | August 25, 1983 |  Caracas, Venezuela
|
Results edit
| Rank | Athlete | Throws | Final | |||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | Result | ||
| 1 |  Jason Tunks (CAN) |
63.70 | 63.14 | 62.12 | 61.93 | 61.68 | 63.67 | 63.70 m |
| 2 |  Frank Casañas (CUB) |
60.21 | 60.04 | 61.32 | 62.52 | 62.61 | X | 62.61 m |
| 3 | Lois Maikel Martínez (CUB) |
60.78 | 60.12 | X | 60.33 | 61.36 | 60.10 | 61.36 m |
| 4 |  Josh Ralston (USA) |
54.14 | 56.48 | X | X | 59.57 | X | 59.57 m |
| 5 |  Jorge Balliengo (ARG) |
X | 53.43 | 59.39 | X | — | X | 59.39 m |
| 6 | Doug Reynolds (USA) |
X | 56.10 | 58.49 | 58.60 | 58.39 | — | 58.60 m |
| 7 | Eric Forshaw (CAN) |
56.74 | 56.27 | 57.42 | 56.84 | 55.49 | X | 57.42 m |
| 8 | Marcelo Pugliese (ARG) |
55.39 | 55.13 | X | 55.88 | 55.18 | X | 55.88 m |
| 9 |  Expedi Peña (DOM) |
48.39 | 48.09 | 51.33 | 51.33 m | |||
| 10 |  Alleyne Lett (GRN) |
X | 47.22 | 40.84 | 47.22 m | |||