Crowell suffered a torn Achilles while working out Monday, Adam Schefter of ESPN reports. He's scheduled to undergo season-ending surgery next week.
Viewed as a potential Marshawn Lynch replacement after inking a one-year deal with Oakland in March, Crowell saw any tenuous hold he might have had on the Raiders' top backfield job take a significant hit last week, when the team nabbed Alabama product Josh Jacobs in the first round of the draft. Crowell's injury now leaves Jacobs as the clear top candidate for carries, though the Raiders will likely add another veteran to their backfield before Week 1. The 26-year-old Crowell should at least have time to get healthy before the 2020 offseason, at which point he may need to find a new team as a free agent.