Baltimore Ravens outside linebacker Terrell Suggs, from left, Mike Wallace, former player Ray Lewis and inside linebacker CJ Mosley kneel down during the playing of the US national anthem. Matt Dunham / AP Photo
Baltimore Ravens outside linebacker Terrell Suggs, from left, Mike Wallace, former player Ray Lewis and inside linebacker CJ Mosley kneel down during the playing of the US national anthem. Matt DunhamShow more
WATCH: NFL players hit back at Donald Trump with fresh protests
More people kneel across American football league as US president calls for supporters to boycott games.