Blake Treinen was placed on the 15-day injured list with right forearm tightness Saturday after the Los Angeles Dodgers waited almost a week to see how their right-handed reliever was progressing. The move came a day after Treinen warmed up but didn't enter the opener of a three-game series against the Texas Rangers. Treinen last pitched April 13, and manager Dave Roberts said he reported the soreness after that outing.