INDIANAPOLIS — The Indianapolis Colts take Peyton Manning's injury seriously.

INDIANAPOLIS — The Indianapolis Colts take Peyton Manning's injury seriously.

Jim Irsay's tweets, not so much.

A day after the team owner wrote on Twitter that he was in Hattiesburg, Miss., the city Brett Favre calls home, coach Jim Caldwell and his players tried to dismiss speculation Favre would be joining the Colts as Manning's backup.

"I think they're hilarious," defensive captain Gary Brackett said of Irsay's posts. "Usually, he's trying to write something from some kind of country song, he has a lot of giveaways or whatever. But I wouldn't call anything on Twitter gospel."

Regardless, the Colts are now in the midst in a swirling storm that involves the league's only four-time MVP, Manning, the league's only other three-time MVP, Favre, and an owner who uses social media to connect directly — frequently and sometimes humorously — with fans.

Manning has been on the physically unable to perform list since training camp opened Aug. 1 as he continues to recover from May neck surgery, the second surgery on his neck in 15 months. On Saturday evening, Manning said he would not play in the Colts' final two preseason games because the recovery was taking longer than expected, in part he believes, because he could not work out with team trainers during the 41/2;-month lockout.

Caldwell has not said when Manning will return to practice after missing 25 consecutive workouts. Manning insists he'll need the next two weeks just to get healthy.

Seahawks

Former St. Louis linebacker David Vobora, from Eugene, has agreed to a contract with the Seattle Seahawks.

Seattle announced the signing on Monday. To clear a roster spot, Seattle released running back Vai Taua.

Vobora was the final pick of the 2008 draft out of Idaho. He went on to play 34 games with St. Louis including 16 starts. Vobora had 97 tackles — including 24 on special teams — during his three seasons with St. Louis.

He'll add depth to a linebackers group that saw David Hawthorne shift inside and Leroy Hill step in at outside linebacker after Lofa Tatupu was released earlier this month. Vobora was waived by the Rams on Aug. 12.

Broncos

Denver Broncos coach John Fox has seen enough to name Kyle Orton his starting quarterback.

What he hasn't determined is who's No. 2.

Fox said Tim Tebow and Brady Quinn have two more preseason games to win the job as Orton's primary backup.

Because the league's new rules don't mandate teams designate their quarterback rotation on game day any more, the winner of that QB competition might remain a mystery, however, barring an injury to Orton.

The Broncos began training camp trying to trade Orton but when no teams made an offer, they opened the competition and Orton quickly showed he was the best of the bunch.

Patriots

NFL defensive lineman Albert Haynesworth pleaded no contest to a charge of simple assault on Monday to resolve a case in which he was accused of touching a waitress' breast while having drinks with friends at a Washington hotel.

If he stays out of trouble over the next 18 months and completes 160 hours of community service, prosecutors will drop the charge entirely. Haynesworth, who was recently traded from the Washington Redskins to the New England Patriots, appeared in D.C. Superior Court to enter his plea.

After a prosecutor read the facts the government would have proven at trial in the case, including that Haynesworth had slid his credit card down the woman's shirt and touched her breast, the judge asked Haynesworth to respond.

"I do not contest the government's proffer of facts on this charge," he said.

Bills

Fred Jackson is feeling underappreciated in wondering what he has to do to prove to the Buffalo Bills that he's their No. 1 running back.

Jackson says he doesn't know where he stands with the team after C.J. Spiller started and got a majority of snaps with the first-stringers in a 24-10 preseason loss at Denver on Saturday. The five-year veteran spoke out after the team returned to practice at their facility in Orchard Park on Monday.

Jackson believes he's earned the right to be treated as the Bills starter based on how he's led the team in rushing the past two years. Coach Chan Gailey says he regards both players to be starters, while adding Jackson is "a little bit ahead" of Spiller.