Given the rather large volume of the universe, I suppose it's possible. Not as an initial condition as far as I can tell though because of the conservation of angular momentum. However, given the right circumstances of impact events on a rogue planet (with no other bodies to perturb its non-rotation), I suppose it's possible. Highly unlikely, but theoretically possible.

As to why planets rotate, Cornell (the home of Carl Sagan) has a great explanation.

What I am saying is that there will be no planets if there was no initial angular momentum in the primordial solar nebula. If a nebula with absolutely no rotation collapses, then there will only be a central non-rotating star and there will not be any planets. Planets form out of a protostellar disk, which itself forms only because of the initial angular momentum of the cloud. The dynamics of a rotating body is of course controlled by forces like gravity. Kepler's laws are a direct consequence of gravity.

Given the rather large volume of the universe, I suppose it's possible. Not as an initial condition as far as I can tell though because of the conservation of angular momentum. However, given the right circumstances of impact events on a rogue planet (with no other bodies to perturb its non-rotation), I suppose it's possible. Highly unlikely, but theoretically possible.

As to why planets rotate, Cornell (the home of Carl Sagan) has a great explanation.

What I am saying is that there will be no planets if there was no initial angular momentum in the primordial solar nebula. If a nebula with absolutely no rotation collapses, then there will only be a central non-rotating star and there will not be any planets. Planets form out of a protostellar disk, which itself forms only because of the initial angular momentum of the cloud. The dynamics of a rotating body is of course controlled by forces like gravity. Kepler's laws are a direct consequence of gravity.