Miami Dolphins tailback Knowshon Moreno was present at minicamp but worked out sparingly and was rarely involved in team 7-on-7 drills.

The Sun Sentinel reports Moreno is "battling a medical issue according to a source," and has been fighting off the medical issue for a number of weeks.

The Dolphins signed Moreno as a free agent hoping he would start for the team. It remains unclear if Moreno will participate in the last day of minicamp, when a controlled scrimmage will be held.