DETROIT (AP) Calvin Johnson, one the most spectacular receivers in NFL history, retired from the Detroit Lions and rekindled memories of the way superstar running back Barry Sanders quietly stepped away from football.

The 30-year-old Johnson called it a career after nine seasons filled with highlight-reel catches, dozens of touchdowns and nearly 12,000 yards receiving. The 6-foot-5 receiver was known as Megatron, a sign of respect for his imposing skills and unusual mixture of speed, power and gracefulness.

Shortly after Detroit finished last season with a 7-9 mark - their seventh losing season in nine years - Johnson announced he was evaluating his future. He had reportedly told some teammates entering last season that it would be his last and told coach Jim Caldwell afterward that he was retiring.

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Johnson piled up 731 career receptions for 11,619 yards, a league-record 86.1 yards receiving per game, and 83 touchdowns against defenses often geared to stop him. He reached 10,000 yards (115 games) and 11,000 yards (127 games) yards quicker than anyone in NFL history. Including the postseason, he has another league mark with six 200-yard receiving games.

IRVING, Texas (AP) - Dallas quarterback Tony Romo has undergone shoulder surgery and should be ready for offseason workouts when they start in May.

Romo had the procedure on the left collarbone that he broke twice last season, causing him to miss 12 games. The recovery time is six to eight weeks.

The first injury came in Week 2 against Philadelphia, and the Cowboys went 0-7 without him on their way to a last-place finish in the NFC East at 4-12. Dallas won in his return at Miami, but he got hurt again in his second game back against Carolina.

Because of Romo's injuries, the Cowboys are likely to sign a backup in free agency to compete with Kellen Moore, who started the last two games in 2015.

JACKSONVILLE, Fla. (AP) - A person familiar with the negotiations says the Jacksonville Jaguars have agreed to terms with Denver Broncos defensive end Malik Jackson.

The six-year deal is worth up to $90 million and includes $42 million guaranteed, the person said. The person spoke to The Associated Press on condition of anonymity because free-agent deals can't be finalized until Wednesday.

Signing Jackson is the first step - a huge one - to rebuilding Jacksonville's defense.

The Jaguars finished near the bottom of the league in just about every defensive category, and a lack of consistent pass rush was considered the main reason for the team's struggles.

Jackson had 129 tackles, 14 sacks and two forced fumbles in his last three seasons. He started all 16 games in 2015, finishing with 45 tackles, seven passes defensed and five sacks.

MIAMI (AP) - Defensive end Mario Williams signed a $16 million, two-year contract with the Miami Dolphins, who now have an abundance of Pro Bowl pass rushers - for the moment, at least.

Williams reached the agreement a week after being released by the Buffalo Bills. The Dolphins sought reinforcement at end because they may lose defensive end Olivier Vernon in free agency, and the status of four-time Pro Bowl end Cameron Wake is in doubt, too.

Miami's defensive front also includes four-time Pro Bowl tackle Ndamukong Suh.

Last week Miami placed a $12.734 million transition tag on Vernon, allowing him to negotiate with other teams. He's widely expected to sign elsewhere, and the Dolphins are now unlikely to match the offer, although they have the right of first refusal.

Wake might be allowed to depart, too. He's 34 and coming off a torn Achilles tendon, and the Dolphins have been negotiating in vain to reduce his $9.8 million salary cap hit.

TENNIS

MOSCOW (AP) - Nike and other sponsors swiftly distanced themselves from Maria Sharapova after the world's highest-earning female athlete outed herself as a longtime user of a recently banned drug.

Swiss watch brand Tag Heuer and German luxury car company Porsche quickly followed the sportswear giant, suspending their support of the five-time Grand Slam winner after she announced on Monday that she failed a drug test for meldonium at the Australian Open in January, days after the substance was banned.

Meldonium was regularly given to Soviet troops in the 1980s to boost their stamina while fighting in Afghanistan and is normally prescribed for medical use for periods of four to six weeks. Sharapova faces possible sanctions after testing positive for the drug, also known as mildronate. She said she started using it 10 years ago for various medical issues and did not indicate in her announcement Monday how often she has taken it.

Her lawyer, John J. Haggerty, declined to go into specifics but said during a conference call he wanted ''to disabuse the concept that Maria took mildronate every day for 10 years because that's simply not the case.''

SOCCER

NEW YORK (AP) - A Florida-based soccer consultant and match agent who was once licensed by FIFA pleaded guilty to money laundering and wire fraud conspiracy in a New York City court, admitting that he paid hundreds of thousands of dollars to secure media and marketing contracts.

Miguel Trujillo, of Palm Beach County, Florida, was freed on $1.5 million bail after his appearance before U.S. District Judge Raymond J. Dearie in Brooklyn.

The judge warned Trujillo, a Colombia citizen and U.S. legal permanent resident, that his plea to three conspiracy charges and a single count of filing a false tax return might force his deportation.

Dearie said prosecutors may choose to write a letter on his behalf urging leniency if he lives up to the terms of his plea agreement. Such a letter, he said, may influence how he sentences Trujillo on charges that otherwise could bring a prison term of up to 63 years.

Prosecutors said Trujillo has agreed to forfeit $495,000 after admitting to participating in multiple schemes to bribe soccer officials since 2008 while he was licensed by FIFA, the governing body of international soccer, to negotiate and arrange matches between FIFA member associations.