1. Mantha needs to earn it first - guys like Nyquist, Tatar, Pulks worked very hard and produced before being called up - shouldn't be any different for this guy unless Holland magically decides he gets special treatment
2. There are so many guys ahead of Mantha if there is an injury - right now we have Franzen and Jurco on the sideline and Pulks is clearly ahead of Mantha on the call-up so its not likely that we see him up over those 3 unless we have a string of injuries somehow.
3. The wings will want him to spend time developing properly rather than player lower minutes in Detroit and bouncing around between teams.