I would imagine the team is waiting to see the results of the evaluation Sunday before recalling Zepp. If I remember the clause in the CBA correctly, teams are permitted two emergency recalls per season. Zepp was already recalled on an emergency basis and then later, again IIRC, the team put Mason on IR in order to be cap compliant. Emergency recalls have a maximum stay of 48 hours. If all that is accurate, it probably isn't prudent to recall Zepp on a second emergency basis and not have that option should it be needed for later in the season.