The Mets have said 1B prospect Peter Alonso was not promoted this September because they wanted to see if Jay Bruce could be an option at first base next season.
The team also didn't want to promote Alonso so they could delay beginning his service time clock until next season. That said, it does make sense to see Bruce play as much first base as possible to best gauge how he can be used going forward...
"I think we need to make some sort of determination going into the offseason whether it is feasible bringing him back as a first baseman next year," Mets manager Mickey Callaway admitted last month. "I definitely think that is a possibility. I think that is one of the things we need to find out this last part of the season."
Unfortunately for Callaway, Bruce continues to look mostly adequate and - at times - below average when faced with rare situations in the field.