After spending most of spring training working on his curveball, Trevor Cahill's extra effort is starting to pay off. Cahill pitched eight strong innings for his first win of the season, Conor Jackson singled home the go-ahead run and the Oakland Athletics beat the Toronto Blue Jays 2-1 on Thursday. "[Cahill] was outstanding," Oakland manager Bob Geren said. "He had the strikeouts going, he had the good curveball going. He started developing that pitch at the end of last year and took it into spring training and kept working on it and working on it. "I couldn't be happier with how that pitch has progressed," Geren said. "Trevor has taken to it and it just adds something to his arsenal that's going to help him." Known mostly for his sinker, Cahill spent hours in the spring working on his curve with A's pitching coach Ron Romanick and got good use out of it against the Blue Jays. Read more: http://scores.espn.go.com/mlb/recap?gameId=310407114