| Roles | Referee |
|---|---|
| Sex | Male |
| Full name | Arnaldo•Román Rivera |
| Used name | Arnaldo•Román |
| Nick/petnames | El Caballero del arbitraje |
| Died | July 2023 |
| NOC | Puerto Rico |
| Games | Sport (Discipline) / Event | NOC / Team | Phase | Unit | Role | As | |
|---|---|---|---|---|---|---|---|
| 2004 Summer Olympics | Baseball (Baseball/Softball) | PUR |
Arnaldo Román | ||||
| Baseball, Men (Olympic) | Game #1 | Australia — Japan | 1st Base | ||||
| Baseball, Men (Olympic) | Game #2 | Japan — Italy | 1st Base | ||||
| Baseball, Men (Olympic) | Game #8 | Cuba — Greece | 2nd Base | ||||
| Baseball, Men (Olympic) | Game #11 | Australia — Italy | Home Plate | ||||
| Baseball, Men (Olympic) | Game #14 | Australia — Japan | 3rd Base | ||||
| Baseball, Men (Olympic) | Game #17 | Italy — Chinese Taipei | 1st Base | ||||
| Baseball, Men (Olympic) | Game #22 | Cuba — Canada | Home Plate |