When the A’s claimed 28-year old righty reliever Dan Otero off waivers from the Yankees, I’m sure they didn’t think he would become the pitcher that he has in 2013. Otero pitched in 23 games (0 starts) in AAA-ball for the A’s this year and he was 1-0 with 15 saves, a 0.99 ERA and a 0.55 WHIP. That earned him a promotion to the show. He has pitched in 31 games (0 starts) for the A’s so far this year and he is 2-0 with a 1.43 ERA and a 1.27 WHIP. He has given up 42 hits and 6 walks while whiffing 26 batters in his first 37 2/3 innings this year. Otero has now pitched in 43 games (0 starts) in his first two years in the majors and he is 2-0 with a 2.52 ERA and a 1.38 WHIP.