ARLINGTON – One day after suffering a concussion, Astros backup catcher Carlos Corporan was still a bit dizzy and dealing with a headache when he was placed on baseball’s seven-day concussion disabled list Tuesday. “I have a little bit of a headache,” Corporan said. “They had me take a test yesterday, but I didn’t pass it. They were going to give me another test today. But they didn’t want to risk anything, so they put me on the DL for seven days. I’ll rest and I think I’ll be ready in seven days.” Corporan, 29, is hitting .245 with seven home runs and 17 RBIs in his first full season [...]