Originally Posted by doublem23
Because if Mitchell makes an appearance in Chicago (which is just not going to happen), his arbitration clock starts, so I'd guess the Sox don't want to burn through those arb years to see if he's a good baserunner.
If Mitchell is here in September, its because of a combination of him having a great year in the minors (that's good!) and also we're playing for absolutely nothing but looking forward to next season (that's bad!). At most, maybe they'll let Mitchell come sit on the bench in September, but he's not seeing the field.
The clock doesn't start till you are placed on the 25 man roster, unless that changed in the last CBA.