The Rockies designated left-hander Eric Stults for assignment and reinstated Esmil Rogers from the disabled list, according to Troy Renck of the Denver Post (on Twitter). The Rockies have confirmed the moves, which open up a 40-man roster spot (Twitter link).
Stults, who spent last season in Japan, appeared in six games for the Rockies this year. He posted a 6.00 ERA with 5.3 K/9 and 3.0 BB/9 in 12 innings. The 31-year-old was on the Dodgers from 2006-09 before Los Angeles sold his contract to the Hiroshima Carp last spring.