OAKLAND, Calif. -- Sonny Grays disappointing season got even worse Saturday.Oaklands ace left after five innings with soreness in his right forearm, and Jake Arrieta pitched eight innings of three-hit ball to help the Chicago Cubs beat the Athletics 4-0.Gray (5-11) felt soreness in his right extensor muscle while allowing two runs and five hits. The injury is the latest setback in a disastrous season for the 26-year-old right-hander, whos already been on the DL with a right shoulder injury.Gray, a 2015 All-Star who last season finished third in AL Cy Young balloting, had the highest ERA in the majors (5.84) going into Saturday.He had really good stuff today, so its unfortunate to hear that hes hurt because this is the best hes looked in a long time, As catcher Stephen Vogt said.Gray first felt the injury after striking out Dexter Fowler with a curveball in the top of the fourth.I was trying to go back out there for the sixth, Gray said. I told them after the fourth I had a little bit of an issue come up and when I went back out for the fifth it kind of felt the same.They kind of decided to shut it down there. I lobbied to go back out there. It obviously wasnt going to happen.The severity of the injury wasnt immediately known.Hopefully its minor, manager Bob Melvin said.Looked like he was throwing the ball pretty well, he added. He didnt come to me, he was trying to get some heat on it and go back out there. When he talked to the trainer about it, then we felt like we need to get him out of there.Arrieta (13-5) was 0-3 in his previous five starts and 1-4 since ending a 20-decision winning streak on June 22. The NL Cy Young Award winner struck out four and walked one on 108 pitches.The NL Central-leading Cubs have won five straight and 16 of 22.Ben Zobrists two-out two-run single off Gray broke a scoreless tie in the top of the third.Zobrist and Addison Russell had two hits each for the Cubs.Were firing on all cylinders right now, Arrieta said. Does that mean we wont lose three in a row? Who knows? It doesnt matter to us. We want to come out tomorrow and keep the momentum on our side.ROSTER MOVEThe As sent LHP Dillon Overton to Triple-A Nashville and called up LHP Patrick Schuster. Overton had a 10.97 ERA and allowed 11 homers in five starts. Schuster was 1-0 with a 1.16 ERA and seven saves in 32 appearances (all in relief) at Nashville.BILLY-BALL COMMEMORATEDThe As commemorated the early 1980s Billy-Ball era with former players Rick Langford, Mike Heath, Dwayne Murphy, Mike Norris and Mike Davis attending a pregame ceremony and Billy Martin Jr. throwing the first pitch. Former broadcaster Roy Steele and professional cheerleader Krazy George also attended. The As wore vintage gold jerseys and the Cubs sported powder blue from the same era.TRAINERS ROOMAthletics: RHP Henderson Alvarez, sidelined since spring training recovering from shoulder surgery last summer, has started plyometric workouts ahead of a throwing program after a recent doctors appointment cleared him. ... LHP Sean Doolittle threw a 25-pitch bullpen session on Saturday. Hes been on the disabled list with a shoulder strain since June 26.UP NEXTCubs: RHP Kyle Hendricks has a 1.04 ERA over his last nine outings, including eight starts, since June 19. He threw 123 pitches in his last start, a shutout against Miami. Hendricks has never faced the Athletics.Athletics: Rookie LHP Sean Manaea is 1-2 with a 3.14 ERA in his last seven outings, including six starts, since coming off the disabled list June 29 with a forearm strain. Manaea is 1-1 with a 3.55 ERA in two interleague starts. 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Mike Singletary Jersey For Sale . -- Running backs Darren McFadden and Rashad Jennings were back at practice for the Oakland Raiders on Wednesday despite being hampered by hamstring injuries.Wimbledon, England (Sports Network) - Reigning champion and five-time titlist Serena Williams and last years runner-up Agnieszka Radwanska were a pair of easy opening-round winners Tuesday at Wimbledon. The world No. 1 superstar Williams extended her career-best winning streak to 32 matches by handling Luxembourgs Mandy Minella 6-1, 6-3 on Centre Court at the venerable All England Club. Williams won every point on serve in a lopsided first set, but Minella stunningly broke the American stalwart and then held for a 2-0 lead in the second. The formidable Williams, however, then went on to win four straight games, including a pair of breaks, to assume control once again. Minella would later fight off a match point before the American great converted on a second to move on. "For me, its the greatest moment for a tennis player, to walk out on Centre Court," Williams said. "That was such a great moment, too. So many great memories on this court." Williams is now 75-3 since losing in the first round at last years French Open. The 31-year-old is the reigning Wimbledon, French Open and U.S. Open champ who owns 16 Grand Slam singles titles overall. She beat Radwanska in last years final here to capture her third Wimbledon title in four years and also captured an Olympic gold medal at the All England Club last summer. Up next for Williams will be Frances Caroline Garcia. The fourth-seeded Radwanska routed helpless Austrian Yvonne Meusburger 6-1, 6-1. The high-flying Williams and Radwanska were joined in the round of 64 by sixth-seeded Australian Open runner-up and former French Open champ Li Na, as the Chinese star drubbed Dutchwoman Michaella Krajicek 6-1, 6-1. Krajicek is the half sister of former mens Wimbledon winner Richard Krajicek. Seventh-seeded German left-hander Angelique Kerber moved on by driving out American Bethaanie Mattek-Sands 6-3, 6-4.dddddddddddd Also, left-handed British crowd favorite Laura Robson took out 10th-seeded Russian Maria Kirilenko 6-3, 6-4, 11th-seeded Italian Roberta Vinci vaulted past South African Chanelle Scheepers 6-2, 6-1, and 14th-seeded former U.S. Open champion Sam Stosur whipped Slovak Anna Schmiedlova 6-1, 6-3 on Day 2. Kirilenko was a Wimbledon quarterfinalist a year ago. Meanwhile, 18th-seeded Slovak Dominika Cibulkova snuck past Italian Maria Elena Camerin 6-4, 4-6, 6-4; 24th-seeded Chinese Peng Shuai pasted Spaniard Anabel Medina Garrigues 6-3, 6-2, Romanian Alexandra Cadantu vanquished 28th- seeded Austrian Tamira Paszek 6-2, 7-5; 30th-seeded German Mona Barthel held off Romanian Monica Niculescu 6-3, 4-6, 7-5; and American Alison Riske upended 31st-seeded Romina Oprandi 6-7 (5-7), 7-5, 3-1, as the Swiss retired in the third set. Paszek had reached the Wimbledon quarterfinals the last two years. Several other women landed in the second round, including American Madison Keys, hot Romanian Simona Halep, Polands Urszula Radwanska, Estonian Kaia Kanepi, and 42-year-old Japanese Kimiko Date-Krumm, who is the second-oldest player to win a main-draw match at Wimbledon. The great Martina Navratilova holds the record, at 47 years of age. Halep headed to Wimbledon having won back-to-back tournaments, on clay in Germany and grass in The Netherlands, respectively. Shes now enjoying an 11- match winning streak after beating Belarusian Olga Govortsova in three sets. And Russian Olga Puchkova topped Arantxa Rus 6-4, 6-2, as the Dutchwoman Rus tied the WTA record for consecutive match losses at 17, equaling the mark set by Sandy Collins between 1984-87. "I need to play better to win matches at this level," Rus said. "I try my best. I try to keep working hard. Thats the only thing you can do." ' ' '