In about two weeks, Gregory Polanco could be playing in the majors. The month of June is usually when we start to see a lot of promotions throughout the minor league system, and sometimes the promotions are a chain reaction. Once Polanco moves up, that opens a spot in Indianapolis for an outfielder from Altoona. The newly vacated spot in Altoona opens a spot for someone to move up from Bradenton. And so on.

Usually you will see the chain reaction type promotions with pitchers. You're not usually going to have a group of position players all in line for a promotion at the same time, and all playing the same position.

Last year, the promotions started around the second week of June. Here were the dates for each of the major promotions:

June 7th: Andrew Lambo to Indianapolis

June ...

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