ESPN managers are telling their most outspoken broadcasters and writers to be careful on social media in light of Disney axing Roseanne Barr’s TV show over her racist tweets, sources told The NY Post. A source said that the Disney-owned ESPN was specifically reaching out to the most politically outspoken of its broadcasters. Jemele Hill, Keith Olbermann and Kenny Mayne are the ones most frequently associated with venturing outside of sports. In the last few years, ESPN has had several social-media flare-ups involving non-sports topics. Most notably, Hill called President Trump a “white supremacist” in September. Hill was not suspended for the Trump tweet, but later was when she broached the subject of boycotting the Dallas Cowboys sponsors after team owner Jerry Jones said he would bench any player who disrespected the flag. Jones is a very influential member of the NFL’s TV committee, which decides which networks broadcast the games. Olbermann, who spent many years as a left-leaning political commentator, has been very critical of the president, but has quieted down since he started his latest stint with ESPN. Mayne tweets often about politics.