<sod > "Quite some time ago we mandated 'stop' signs on all jerseys," said Kobelka in an email.< eod>< sod > "Quite some time ago near january we mandated 'stop' signs on all jerseys," said Kobelka in an email. The signs serve as a reminder for players to avoid checking each other from behind.  "We also continue to offer more non-body checking leagues.< eod>