There shouldn't be a set time table for this guy. He's got to be handled like a regular middle of the road grunt, IMO. Let him perform, take instruction, learn the pro system and speed, get comfortbale with the level of batters, and let him stay there until his skill dominates that level. Setting aside a planned progression is the wrong way to go and could set him up for failure. He's got to earn his place, and feel like he earned it rather than merely handed to him. That's how its done with every other player.