MLB rosters are gathered from the active 25 man roster page for each team on mlb.com.  These rosters are updated everyday and are as accurate as the MLB site.

This is a one time alert to inform you that the player has changed teams.  If you want to retain that player in your roster, you need not do anything.  His indexes will reflect his position and traveling with the new team automatically.

Since that player in not on an active MLB roster, you cannot use him in a lineup.  So, you should delete that player from your roster (by clicking the trash can next to the player's name) and replacing him with another player.

The cause for this condition is usually that the MLB page has either changed the spelling of his name or changed the Date of Birth (yes, they make corrections like that).  BaseballVMI uses the combination of the player's name and Date of Birth to define a unique player (this allows for duplicate names).  This information is copied into your personal roster.  If/when MLB changes either data item, then there is a mismatch.

The recommended action to take is to delete the player from your roster (by clicking the trash can next to his name) and re-selecting that player from the MLB roster.

In this scenario, which rarely happens, except when Coors Field is in the mix, the pitcher is in big trouble. The pitcher’s fine tuning around the strike zone will be off, at the same time as the hitter’s have recently been seeing more movement than this pitcher has available to him. Pitcher beware, coaches beware, fantasy team managers should dump the pitcher for a better matchup of VMI’s. In this scenario, everyone’s statistics will go up, up, up. Higher ERA; Higher Batting Averages; Higher everything!

As you can imagine, this rarely happens, as well, except when Coors Field is in the mix. However, the pitcher has been favored recently with good movement, even if his opponents were not affected negatively, this can lead the pitcher to becoming so careful that he may miss an opportunity to come hard at today's opponent. The hitters in this scenario are at a disadvantage, but mainly against the 4-seam fastball, because it lifts upward, and is the only pitch to do so. Furthermore, the hitters’ command of the strike zone will be off, which will cause them to swing when they shouldn't and also take pitches for too many called strikes. They may not even be able to bunt effectively in this scenario.