The union for police officers who work San Francisco home games says its members may boycott policing the stadium if the 49ers don’t discipline Colin Kaepernick for refusing to stand during the national anthem.

A letter sent to the 49ers from the Santa Clara Police Officers Association was obtained Friday by KNTV-TV, the NBC affiliate in San Jose.

It said that if the team ‘‘fails to take action to stop this type of inappropriate behavior it could result in police officers choosing not to work at your facilities.’’

It adds that the union leadership has a duty to protect its members from harassment.

The quarterback has refused to stand for the anthem at the team’s preseason games in protest of issues including racial injustice and police brutality. He said he plans to continue into the regular season.

Manny Lawson is cutVeteran Manny Lawson was cut in what became the latest in a string of offseason shuffles by the Bills at outside linebacker.

Now the starting pass-rushing job falls to journeyman Lorenzo Alexander, who was signed in April to fill a special teams role.

Coach Rex Ryan declined to provide specifics why Lawson was released, except to credit Alexander for earning the job. Ryan previously spoke highly of Lawson, citing the player’s versatility and intelligence in noting he would have an important role at several positions.

As for Alexander, Ryan said: ‘‘At no point did I think his role would be a starter for us. But he earned the right.’’

In 10 NFL seasons split between Washington, Arizona and Oakland, Alexander has nine career sacks while starting just 16 of 127 career games. He’ll start on the left side opposite Jerry Hughes at a position that has been in flux since Mario Williams was cut in March.

First-round pick Shaq Lawson is the heir apparent, but he’ll miss at least the first six weeks recuperating from shoulder surgery.

The job then fell to Manny Lawson, whose departure was regarded as a surprise.

Lawson opened camp sidelined by a partially torn pectoral muscle and wasn’t cleared for practice until three weeks ago. He is also being investigated by the NFL for potentially violating the league’s personal conduct policy. Lawson said he’s done nothing wrong, and the NFL has not revealed what it is investigating.

The pass rush was a significant concern in Ryan’s first season. Buffalo managed just 21 sacks — a franchise low for a 16-game season — and a year after the team had a league-leading 54.

The Bills also cut fullback Jerome Felton, opening the door for rookie free agent Glenn Gronkowski — the younger brother of Rob Gronkowski — to make the roster.

Watt looks like a go

Texans coach Bill O’Brien said J.J. Watt is feeling much better and that it ‘‘looks decent’’ for him to play in the season opener against Chicago on Sept. 11. Watt missed the entire preseason on the physically unable to perform list after having back surgery in July . . . Chiefs running back Jamaal Charles remains iffy for the season opener against the Chargers, coach Andy Reid said, but added he wouldn’t be ruled out of next weekend’s game. Charles tore the ACL in his right knee in Week 5 last season. He has been working out for several weeks, though he did not participate in any of the Chiefs’ preseason games . . . Jets coach Todd Bowles announced that backup quarterback Bryce Petty has a bruised shoulder after an MRI revealed no structural damage.

With Petty’s status uncertain, Bowles said it’s ‘‘fair to say’’ Geno Smith solidified the No. 2 job behind Ryan Fitzpatrick.

Falcons keep BryantMatt Bryant appears set for his eighth season as Falcons kicker after Shayne Graham was cut. After missing two preseason games with muscle tightness in his leg, Bryant, 41, returned to kick a 27-yard field goal and two extra points in Atlanta’s 17-15 preseason win over Jacksonville on Thursday night . . . The Titans waived wide receiver Justin Hunter (second-round pick in 2013) and running back Bishop Sankey (second-rounder, 2014) along with veteran running back Dexter McCluster . . . The Florida Highway Patrol said ex-NFL player Lawrence Taylor was arrested in Palm Beach County on a DUI charge, according to multiple reports.

WPTV reports that Taylor, 57, was driving south on the turnpike from Beeline Highway about about 5:20 p.m. when he became involved in a crash. The TV station says that Taylor switched lanes and hit a motor home and sideswiped a patrol vehicle.