The Ravens are fighting for a playoff berth, yet fans aren't flocking to M&T Bank Stadium like in past seasons.

The franchise blames, in part, a "one-time" protest during the national anthem in Week 3 for the "noticeable" number of fan no-shows, Ravens president Dick Cass wrote in a letter to season-ticket holders and stakeholders.

"The numbers [of no-shows] are higher, and it is noticeable," Cass wrote in the letter obtained by ESPN.com. "There are a number of reasons for the no-shows, but surely the one-time protest in London has been a factor."

On Sept. 24, the Ravens and Jaguars kicked off Week 3 in London, the first NFL game after President Donald Trump condemned the NFL and its players' protests, saying the league's games are "boring" and it should "fire or suspend" players who protest during the national anthem.

More than a dozen Ravens players knelt during the national anthem that day and were greeted with boos from home fans the next week in Baltimore where additional players knelt in prayer before standing for the anthem.

"We have responded to your concerns about the protest by re-doubling the efforts of both the organization and our players to make the Baltimore area a better community," Cass wrote, adding he reached out to upset fans.

"In light of recent events, we are also reminded that winning alone is not always enough to make the Ravens the unifying force we want to be," the letter continued. "We don't take your support for granted, and we know that we must continue to earn your respect and investment in us."

The Ravens (8-6) finish the regular season with two home games (Colts, Bengals). Should the Ravens make the playoffs, they'll likely be the away team in the wild-card round.