WR Bryant, DE Mack and lot more

Martavis Bryant's career is in jeopardy after the Oakland Raiders released him Saturday amid reports that he is facing his third suspension in four years.

Following is a summary of current sports news briefs.

Raiders release WR Bryant as another suspension looms

Martavis Bryant's career is in jeopardy after the Oakland Raiders released him Saturday amid reports that he is facing his third suspension in four years. The NFL Network reported that Bryant is facing another ban that could sideline him for a full season or longer. The 26-year-old Clemson product was suspended for the first four games of the 2015 season and the entire 2016 season because of positive drug tests while he was with the Pittsburgh Steelers.

NFL notebook: Bears acquire DE Mack in a blockbuster trade

The Chicago Bears acquired defensive end Khalil Mack from the Oakland Raiders on Saturday, then reportedly reached a new deal with the pass rusher that will make him the highest-paid defensive player in NFL history. Mack agreed to a six-year, $141 million extensions with the Bears, according to multiple reports. The deal averages $23.5 million per season, includes $90 million in guaranteed money and a $60 million signing bonus. Mack had been a holdout during the pre-season as he sought to become one of the NFL's highest-paid defenders.

Sabalenka overpowers Kvitova as a cull of top seeds continues

Fifth seed Petra Kvitova became the latest big name in the women's draw to crash out of the U.S. Open when she lost to Aryna Sabalenka 7-5 6-1 at the Louis Armstrong Stadium on Saturday. The exit of the Czech, who reached last year's quarter-finals, leaves only three of the top 10 women's players in the running, with defending champion and world number three Sloane Stephens the highest ranked player left in the draw.

Federer hands Kyrgios U.S. Open masterclass

Roger Federer handed Nick Kyrgios a 6-4 6-1 7-5 tennis masterclass by storming into the fourth round of the U.S. Open on Saturday with a ruthless display that left the Australian talking to himself and waving the white flag. With all three of their previous meetings requiring a third-set tiebreak to decide the winner, a packed Arthur Ashe Stadium had expected high drama but instead witnessed a rout as Federer recorded his third win against the unpredictable Australian.

Serena crushes Venus in flat family U.S. Open showdown

Serena Williams crushed older sister Venus 6-1 6-2 in a shockingly subdued third round clash at the U.S. Open on Friday to stay on track for a record-equaling 24th Grand Slam title. The meeting between the famed tennis siblings had been hyped as the biggest night of the U.S. Open but turned into a flat, uninspired spectacle as Serena simply outclassed her sister.

Cibulkova upsets Kerber to reach U.S. Open fourth round

Fourth seed Angelique Kerber's bid for consecutive Grand Slam titles ended when 29th seed Dominika Cibulkova defeated the German 3-6 6-3 6-3 in the U.S. Open third round on Saturday. Momentum shifted firmly in feisty Cibulkova's favor in the third set when she broke to take a 4-2 lead and held for 5-2.

Working U.S. Open night shift fine with Sharapova

Maria Sharapova continued to enjoy working the U.S. Open night shift with a 6-3 6-2 humbling of 10th seeded Latvian Jelena Ostapenko on Saturday, improving her record to 22-0 under the Arthur Ashe Stadium floodlights. There is no denying Sharapova's love for the big stage or the New York crowd's love for her and the five-time Grand Slam champion admitted that she feeds off the buzz.

MLB notebook: Yankees' Chapman return from DL uncertain

Yankees general manager Brian Cashman said Saturday there is no guarantee closer Aroldis Chapman will pitch again in the regular season. "The timeline is tougher because the season is now only a month left to go," Cashman said of the 30-year-old left-hander. "We're hopeful but I can't tell you with any level of confidence one way or the other."

Djokovic puts his foot on the Gasquet to reach last 16

Novak Djokovic enjoyed his first routine victory at this year's U.S. Open at the third attempt on Saturday as the two-time champion eased into the fourth round with a 6-2 6-3 6-3 win over flamboyant Frenchman Richard Gasquet. The sixth-seeded Serb needed four sets to despatch his first two opponents, struggling especially in the opening round against Hungarian Marton Fucsovics in searing daytime temperatures at the start of the week.

Bears land Mack from Raiders, reportedly give him a record deal

The Chicago Bears acquired defensive end Khalil Mack from the Oakland Raiders on Saturday, then reportedly reached a new deal with the pass rusher that will make him the highest-paid defensive player in NFL history. Mack agreed to a six-year, $141 million extensions with the Bears, according to multiple reports. The deal averages $23.5 million per season, includes $90 million in guaranteed money and a $60 million signing bonus.