Now that the Atlanta Braves have re-signed Raisel Iglesias to address their closer situation, the two main roster areas they need to address are shortstop and starting pitching depth. The shortstop market is a mess and the Braves may have to "settle" more than they would like there, but there are a plethora of rotation options including a few that would require a Reynaldo Lopez-like conversion.
While more common than it used to be, converting pitchers from the bullpen to the rotation is still fairly rare. It requires a pitcher to have relatively clean mechanics, some amount of command of a diverse arsenal, and ideally experience starting so the team can be confident that they can hold up to an increased workload.