  Zeeman effect has been an invaluable tool for the detection and measurement
of the effects of a magnetic field on the internal behavior of atoms and
nuclei. Along with M\"{o}ssbauer effect, it has been used to determine the
magnitude of the magnetic field present in nuclei of atoms but has not been
detected inside nucleons so far. In this work, we present a possible signature
of the Zeeman-like effect in nucleons that one can extract from the parton
distributions with the use of statistical models and Fermi-Dirac distribution.
These effects in turn---if electromagnetically dominated---predict the presence
of magnetic fields of an unprecedented magnitude inside protons.
