Manager Don Mattingly said he couldn't talk about the medical issues of Aguilar and Sanchez, who rank third and fourth on the Marlins in homers. Aguilar has played in a team-high 58 games.
Miami recalled infielder Lewin Diaz and outfielder Jerar Encarnacion from Triple-A Jacksonville.
Díaz hit .193 in 161 at-bats for the Marlins the previous two seasons and .266 with 13 homers and 52 RBIs in 58 games this year for Jacksonville.
Encarnacion could make a big league debut. He batted .313 with 13 homers and 28 RBIs in 58 games with Jacksonville and Double-A Pensacola.