  The change in vortex ensemble in BaFe$_{2}$(As$_{0.67}$P$_{0.33}$)$_2$, an
isovalently doped iron-based superconductor (IBS), is studied through global
magnetization measurements and single vortex imaging before and after 6 MeV
proton irradiation. The field dependence of the critical current density
($J_\mathrm{c}$) is analyzed through the strong pinning model, with which the
pristine sample is consistent. After the irradiation, the $J_\mathrm{c}$
aberrates from the strong pinning field dependence of $B^{-5/8}$, and evolves
to a weaker $B^{-1/3}$ dependence with an anomalous two-step behavior creating
a cusp like feature. The cusp coincides with the field of the local minima in
the normalized relaxation rate ($S$), manifested by increased pinning due to
increased intervortex interactions followed by fast vortex dynamics caused by
flux activation at higher fields. Furthermore, single vortex imaging reveals
that while long-range triangular correlation of the Abrikosov vortex lattice is
observed in pristine samples, irradiated samples exhibit a highly disordered
glassy vortex state which is more densely packed with increased pinning force.
These artificial defects incorporated via proton irradiation have the same
pinning effect as Co doping which not only shifts the pinning force to a higher
degree but also broadens its distribution, in contrast to P doping which only
broadens the pinning distribution without inducing a shift. All in all, through
this investigation, we provide a systematic understanding of the pinning
behavior in BaFe$_{2}$(As$_{0.67}$P$_{0.33}$)$_2$ through carefully controlling
the defects in the system.
