Rep. Eric Swalwell, D-Calif., has reported an ex-NFL fullback to Capitol Police after the former player allegedly threatened Swalwell in a Twitter direct message.

Swalwell shared a screenshot of what appeared to be a message from Bruce Miller, who spent five seasons with the San Francisco 49ers, saying it was a "(threat) to execute me."

"Almost time !!! Would you rather Guantanamo or just execution," Miller allegedly wrote with laughing emojis. "f---in traitor."

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Bruce Miller

Bruce Miller of the San Francisco 49ers scores a touchdown during a game against the Baltimore Ravens at Levi's Stadium in Santa Clara, Calif., on Oct. 18, 2015. (Michael Zagaris/San Francisco 49ers/Getty Images)

"Who is this guy threatening to execute me? And how does he have so many followers?" Swalwell wrote.

"This guy" turned out to be the former pro football player, who appeared in 85 NFL games, 77 with the 49ers and eight with the Jacksonville Jaguars in 2020 before retiring.

"My family and staff are deeply disturbed by the threat of execution... apparently by former 49er Bruce Miller. Threats of political violence are unacceptable," Swalwell told NBC Bay Area.

Eric Swalwell

Rep. Eric Swalwell, D-Calif., speaks at a press conference on committee assignments for the 118th U.S. Congress at the U.S. Capitol in Washington, D.C., on Jan. 25, 2023. (Kevin Dietsch/Getty Images)

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Miller was arrested in 2016 for allegedly attacking two men, one of whom was 70 years old. He was promptly released by the 49ers and was charged with seven felonies before they were eventually dropped.

After four years out of football, Miller made his return in 2020 but missed six games for violating the league's PED policy.

Miller was a seventh-round pick in 2011 out of UCF.

Schiff, Swalwell, Omar

Reps. Eric Swalwell, D-Calif., center; Adam Schiff, D-Calif.; and Ilhan Omar, D-Minn., conduct a news conference on being removed from committee assignments in the Capitol Visitor Center in Washington, D.C., on Jan. 25, 2023. (Tom Williams/CQ-Roll Call, Inc via Getty Images)

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Swalwell assumed office Jan. 3, 2013, and is the representative of California's 14th Congressional District in Alameda County in the Bay Area.