A late-season call-up can lay the groundwork for a young player to win a spot on the Opening Day roster the following year, or it can be proof that a player needs more time in the minors if things don't go well.
Whether it's a top prospect being thrust into the heat of a pennant race on a contender or an older prospect getting an extended look on a non-contending team following a strong showing in the upper levels of the minors, the final months of the season are rife with opportunity.
Ahead, we've highlighted seven players who have made the most of their recent call-ups to the big leagues, focusing solely on names who have been promoted since Aug.