Well , there are several reasons why a team might place a player on the 40 - man roster that they do n't intend to call up right away .
The main reason has to do with the Rule 5 draft .
Well , there are several reasons why a team might place a player on the 40 - man roster that they do n't intend to call up right away , but the main reason has to do with the Rule 5 draft .