ENGLEWOOD, Colo. — Shortly after the Denver Broncos began training camp Thursday with Jay Z’s “On To The Next One” blaring over the loudspeakers, their safeties and cornerbacks donned actual blinders.

“It’s about focusing on one thing at a time and focusing on what you’re supposed to be focused on,” safety T.J. Ward said. “You’re supposed to be reading the quarterback and supposed to have your eyes on the receiver. Just training your eyes.”

Defensive backs coach Joe Woods wanted his guys to see what was in front of them and not be distracted by anything in the periphery.

It was an especially timely initiative given Coach Gary Kubiak’s opening-of-camp message to put the Super Bowl behind them and focus solely on what lies ahead.

“I told them we’re not defending anything; we’re chasing the next one,” Kubiak said.

STEELERS: Halfback Le’Veon Bell said he was notified in March by the NFL that he failed a drug test but declined to say what his appeal of a four-game suspension is based upon.

That appeal, Coach Mike Tomlin said, won’t take place until the second week of August. While Bell apologized for being a distraction as the Steelers reported for training camp Thursday, he declined to get into specifics.

JETS: New York made the re-signing of quarterback Ryan Fitzpatrick official, announcing the move less than 10 minutes before the start of the team’s first practice.

Fitzpatrick and the Jets agreed to a one-year deal worth $12 million guaranteed Wednesday night. The Jets tweeted out a picture of Fitzpatrick signing his deal, and the quarterback fully participated in practice.

WASHINGTON: Rookie wide receiver Josh Doctson was placed on the physically unable to perform list at the start of training camp.

Washington put Doctson on the PUP list with an Achilles injury that first occurred at rookie minicamp in May. Doctson returned during organized team activities but left soon after when he aggravated the problem.

LIONS: Detroit signed wide receiver Anquan Boldin to bolster depth at a position depleted by the retirement of Calvin Johnson.

JAGUARS: Running back Denard Robinson insists he wasn’t under the influence of drugs or alcohol when he fell asleep behind the wheel of his car and rolled through a red light and into a retention pond this month.

Robinson was cited for careless driving a week after the July 3 incident.

• Rookie cornerback Jalen Ramsey practiced for the first time since tearing cartilage in his right knee.

BROWNS: Linebacker Armonty Bryant pleaded guilty to attempted drug possession.

Bryant was sentenced to 68 days of probation in a Cuyahoga, Ohio, County court and fined $1,000. A three-month jail sentence was suspended.

VIKINGS: Minnesota gave Coach Mike Zimmer a contract extension as he opens his third training camp with the team.

General Manager Rick Spielman declined to disclose the terms of the deal.

FALCONS: Wide receiver Julio Jones was pulled from practice with what Coach Dan Quinn described as a “little tweak.”