The Rangers on Tuesday placed Kevin Millwood on the 15-day disabled list with a strained left hamstring, the team announced. Millwood originally suffered the injury April 28 against the Blue Jays and was placed on the DL a week later. Hours after being activated from the first DL stint, Millwood labored through 1 2/3 innings Monday before walking gingerly off the mound with team medical personnel. He yielded four runs, three hits and three walks with no strikeouts.