Left-hander Dontrelle Willis of the Cincinnati Reds has been scratched from his start against the Milwaukee Brewers because of back spasms. Lefty Matt Maloney was moved up in the rotation to take Willis’ spot on Sunday. Maloney had been scheduled to start Monday against Houston. Willis (0-6), the 2003 NL Rookie of the Year and a two-time All-Star, has made 12 starts since being called from…