Tannehill fell awkwardly on the sideline while scrambling and didn't get up. Trainers looked at his left knee, which has a brace on it, before taking the quarterback inside. Tannehill suffered a sprained ACL and MCL in the same knee last season and didn't require surgery.
UPDATE: @ProFootballDoc David Chao writes, "It appears Tannehill won’t be able to avoid ACL reconstruction surgery this time. Whether the ACL is 'partially' torn is not the issue. The knee has proven to be unstable. Nine times out of 10, partial ACL ends up unstable and needing surgery."
Tannehill may still need to have surgery if the doctors determine the knee is too unstable to play. We'll wait to hear his short-term prognosis before updating our draft rankings. Matt Moore is the primary backup in Miami. Stay tuned.