on May 14 with a single in the eighth inning, but he strained a hamstring advancing to first base and had to leave the game with an injury. He missed six games with the injury before he returned to the lineup on May 22. From May 8 through June 6, despite batting only .250, he reached base safely in twenty straight games. He had a game-winning grand slam on August 30, which gave the Giants a 9–5 win over Colorado. He missed nineteen of the final twenty games of the season with biceps tendonitis and a sprained AC joint, and on September 26 he had surgery to remove bone spurs and chips from his right elbow. Dealing with injuries all year, Rentería finished the season with a career-low .250 batting average and only 115 hits and 48 RBI. 2010 On April 7, 2010, Rentería had five hits (in five at-bats) in a 10–4 victory over Houston. He started the season well, as he was batting .320 through April 30. However, on April 30, he was forced to leave a game against Colorado after two innings with an injured groin. After missing four games, he returned to the lineup on May 6, but he left that game after two innings when he reinjured the groin. He was placed on the disabled list the next day. He was activated from the DL on May 22, but, after three games, he strained a hamstring on May 25 and was placed on the disabled list again the next day. He returned to the Giants on June 19. However, he returned to the disabled list on August 11 with a biceps injury received the previous night. He returned to the Giants on September 1, but Giants' manager Bruce Bochy announced that Juan Uribe, who had been playing well while substituting for Rentería at short, would remain the starting shortstop, which made Rentería a reserve player. He had four hits on September 16, in a 10–2 win over the Dodgers. On September 23, with the Giants trailing San Diego in the NL West, Rentería delivered a speech during a team meeting in which he told his teammates it could be his last year, and he wanted the Giants to make the playoffs. The Giants managed to overtake San Diego, and they did make the playoffs. Rentería finished the year with career-lows in games (72), hits (67),