The Atlanta Braves placed right-hander Tommy Hanson on the 15-day disabled list Tuesday with a strained lower back. Braves manager Fredi Gonzalez had said Hanson — who is 12-5 with a 4.29 ERA — would likely be given extra rest before his next scheduled start, but Monday night's trade with the Cubs for Paul Maholm made that move unnecessary. Maholm will join the Braves on Wednesday and likely start Saturday against Houston.