| Mel Rosario | |
| Position: | Catcher |
| Bats: | Switch |
| Throws: | Right |
| Birth Date: | 25 May 1973 |
| Birth Place: | Santo Domingo, Dominican Republic |
| Debutleague: | MLB |
| Debutdate: | September 11 |
| Debutyear: | 1997 |
| Debutteam: | Baltimore Orioles |
| Finalleague: | MLB |
| Finaldate: | September 28 |
| Finalyear: | 1997 |
| Finalteam: | Baltimore Orioles |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .000 |
| Stat2label: | Games played |
| Stat2value: | 4 |
| Stat3label: | At bats |
| Stat3value: | 3 |
| Teams: | |
Melvin Gregorio Rosario (born May 25, 1973) is a former Major League Baseball player. Rosario played for the Baltimore Orioles in the 1997 season. In four games, he had no hits in 3 at-bats, with one error at catcher. Rosario was a switch hitter and threw right-handed.
He was signed by the San Diego Padres as an amateur free agent in 1991. He last played professionally in for the Atlantic City Surf of the Atlantic League.