Dolphins coach Jeff Hafley said Thursday that Douglas "tweaked something" during Wednesday's practice, David Furones of the South Florida Sun Sentinel reports.
Hafley doesn't expect the injury to be a long-term concern. Taken with the 75th overall pick this year, Douglas joins a WR room that's widely viewed as the weakest in the league. He'll thus have a chance to compete for immediate playing time if he's back to full strength before training camp. With 4.39 speed, at 6-foot-4, 206 pounds, Douglas could have some value to Miami's offense even if he's just running clear-out routes.