With a new season underway, the NFL is warning specific players and teams that it will not hold back on suspensions. The NFL recently sent a memo to more than 20 players and the teams that they play for, emphasizing the importance of safety and sportsmanship and warning them that they would face suspensions if there are any violations, league sources told ESPN. The league believes this is an additional attempt to try to make the game safer, according to sources. The players who received notice have been penalized and scrutinized in the past. The NFL declined to provide a list of which players were notified, but all the players have been suspended during the past two seasons for on-field infractions that the league will not tolerate this season. Among the players suspended the past two seasons for on-field infractions are Buffalo Bills practice squad safety Kareem Jackson, Pittsburgh Steelers safety Damontae Kazee, Los Angeles Chargers...