Interesting listen to the latest SoxProspects podcast. The guest was Brian Abraham, Director of Player Development. He noted that it was the minor league guys who make the call on when to move guys level to level. Brian would have the conversation with Chaim, but ultimately it is just to keep Chaim informed. Also, he stated that there is no real specific amount of at bats a hitter needs or appearances a pitcher needs at a certain level before a player advances. If a player needs to work on something and they are no longer being challenged at a level, they move the player up. An example he used was if a pitcher had a good fastball/slider combo, but needed to work on his changeup. At a lower level, he may be inclined to just stick with the FB/SL and may be less likely to work the changeup into the mix. With more advanced hitters, he'd be forced to add the 3rd pitch, so they'd move the guy up to face more advanced hitters. He said they are working with Rafaela on using his aggression on pitches in the zone, rather than just swinging at everything, noting his low walk rate. They are very happy with Bello's progression, being a late signee at 18 and how it's great for all of the international signees. It shows that if you put the work in that you can make it. Casas won't be brought up just to fill a hole, but only will be brought up when he's ready. Mayer is a 5 tool player, a great kid, a good listener and someone you don't want to miss an at bat of. Blaze doesn't get enough credit for his patience and pitch recognition, he's not a free swinging home run derby guy.