With Jon Moscot unlikely to be ready for the start of the season, the Reds will probably turn to Melville when they first need a fifth starter. He went six innings Saturday against the Indians, allowing four runs on seven hits, with five strikeouts and no walks.
The Reds have an off day following Opening Day, which would allow them to wait until Sunday, April 10 to use Melville. He's not on the 40-man roster yet, so he might not be on the major league roster until the 9th or 10th.