Trevor Siemian is on track to return to the Denver Broncos' starting lineup Sunday at Tennessee barring a setback.

Coach Gary Kubiak listed Siemian as 50-50 but indicated that if he shows up Saturday like he did Friday — without pain or soreness and able to move around — he'll play vs. the Titans.

Siemian split snaps with Paxton Lynch on Friday.

Kubiak said he'll make his decision Saturday.

More games in London

The NFL will stage four regular-season games in London next year.

The league says the teams and venues for the four games will be announced Tuesday.

The NFL started playing regular-season games in London in 2007 and has played three games per season there. The NFL has never played four games in one season in London.

Arena push in Oakland

Oakland and Alameda County leaders will vote Tuesday on a plan to build a $1.3 billion football stadium at the Coliseum site to keep the Raiders from moving to Las Vegas.

Mayor Libby Schaaf and other local leaders presented details Friday.

The Raiders had no comment on the plan, and owner Mark Davis is committed to moving to Las Vegas, where a $1.9 billion stadium was OK'd by Nevada lawmakers.

Threatening letter

Broncos linebacker Brandon Marshall posted on social media a racist, threatening letter that denounced him for taking a knee during the national anthem earlier this season. He said he wanted to expose the racism that exists in society.

Marshall said he received the letter a couple of weeks ago and turned it over to the team's security department, which has been in contact with the NFL and local law enforcement.

Etc.

• The San Francisco 49ers signed tight end Vance McDonald to a five-year contract extension Friday through the 2021 season. McDonald has 24 catches for 391 yards and four touchdowns this season.

• The NFL says New Orleans safety Kenny Vaccaro will serve a four-game suspension, starting Sunday, because he violated league rules pertaining to performance-enhancing drug use. It ends his season, which included 67 solo tackles, unless the Saints make the playoffs.

• New York Jets right tackle Breno Giacomini and defensive tackle Steve McLendon are among six players ruled out for Sunday at San Francisco.

• Odell Beckham Jr. was fined $12,154 for verbal abuse/excessive profanity toward an official following the Giants' 24-14 loss at Pittsburgh last weekend.

• Oakland punter Marquette King was fined $12,154 for picking up an official's flag and using it as a prop after being roughed by the Bills, and Raiders receiver Michael Crabtree was docked the same amount for taunting.

• Suspended Oakland Raiders pass rusher Aldon Smith (substance abuse) met with NFL Commissioner Roger Goodell in hopes of being reinstated. Smith was suspended in November 2015 for at least one year.