▁uniform ▁in ▁honour ▁of ▁the ▁league ' s ▁ 7 5 th ▁An ni versary . ▁Initial ly , ▁the ▁NFL ▁rule ▁stated ▁that ▁a ▁team ▁may ▁wear ▁their ▁third ▁j er sey ▁only ▁once ▁a ▁year , ▁however , ▁after ▁one ▁year ▁this ▁restriction ▁was ▁increased ▁to ▁twice ▁a ▁year . ▁Some ▁teams ▁have ▁exceed ed ▁the ▁limit ; ▁the ▁ 2 0 1 7 ▁Baltimore ▁Rav ens ▁were ▁an ▁example , ▁we aring ▁their ▁all - black ▁uniform s ▁twice ▁that ▁season , ▁and ▁the ▁less - fre quent ▁black ▁j er se ys ▁on ▁white ▁p ants ▁once . ▁There ▁are ▁currently ▁no ▁rules ▁on ▁we aring ▁alternate ▁p ants . ▁Teams ▁are ▁only ▁permitted ▁to ▁wear ▁alternate ▁j er se ys ▁once ▁in ▁play off ▁games ▁( except ▁the ▁Super ▁Bowl , ▁where ▁teams ▁must ▁wear ▁their ▁standard ▁uniform s ); ▁the ▁only ▁team ▁to ▁do ▁so ▁( other ▁than ▁in ▁ 1 9 9 4 ) ▁was ▁the ▁ 2 0 0 8 ▁San ▁Diego ▁Ch arg ers . ▁In ▁the ▁past , ▁rules ▁allowed ▁for ▁teams ▁to ▁wear ▁their ▁third ▁j er sey ▁two ▁times ▁in ▁the ▁regular ▁season ▁and ▁once ▁in ▁the ▁pr ese ason ▁until ▁ 2 0 1 0 . ▁In ▁ 2 0 1 1 ▁teams ▁were ▁no ▁longer ▁allowed ▁to ▁wear ▁their ▁third ▁j er sey ▁in ▁the ▁pr ese ason . ▁However , ▁there ▁have ▁been ▁some ▁exceptions ▁since ▁ 2 0 1 1 . ▁ ▁Some ▁teams ▁will ▁generally ▁use