CINCINNATI -- For the first time since Spring Training was halted in mid-March by the COVID-19 pandemic, Reds facilities were open to limited individual workouts. But there remain several limitations as mandated by the Centers for Disease Control, state and local governments and Major League Baseball.

Sporting a big smile, Reds rotation ace Luis Castillo and the club shared a selfie photo on social media from the field at Great American Ball Park on Wednesday.

Only players who live in Cincinnati are allowed to access the facilities at the ballpark, and only those who reside in Arizona can show up at the player-development complex in Goodyear. About seven players -- still not listed -- are permitted to be there for medical reasons. Players outside of Cincinnati and Arizona are not allowed to travel into town yet for workouts.

Only Jesse Winker and Castillo are in Cincinnati and able to access the ballpark. No more than four players are allowed to be inside the facility at one time. Any player or coach who enters must have their temperature taken as well as a COVID-19 screening daily.

The clubhouse, batting cages and hydrotherapy pools are still off-limits. Players were not required to wear masks during workouts, but they must during inactive periods. All coaches and members of the training staff must wear masks.

Whole-team workouts are not permitted.

Cincinnati isn’t the only club that has begun to open its doors for voluntary workouts. The Rays, Astros and Marlins have already held workouts over the past week, with more teams reportedly preparing to begin their own.