Sanchez will be added to Miami's big-league roster Thursday, Jon Heyman of MLB Network reports.
Heyman added that Sanchez is a candidate to start against the Nationals this weekend. The top pitching prospect, who has reportedly been touching 100 mph with his fastball at the team's satellite camp, registered a 0.95 ERA, 0.74 WHIP and 39:7 K:BB over his final eight starts (47.1 innings) at Double-A last year.