ENGLEWOOD, Colo. – Denver Broncos reserve wide receiver Kyle Williams, who was in the mix to be the team’s punt returner, suffered an Achilles tendon injury in Saturday’s practice.

Williams was not touched by another player as he was fielding a punt in a return drill when his leg buckled somewhat. He then let out a scream as he fell to the ground. He was taken to the locker room on a cart.

“It’s his Achilles," Broncos coach Gary Kubiak said following practice. " … He wasn’t even touched; just feel bad for him. I know he’s disappointed."

Williams will undergo additional tests, including an MRI. Williams posted on Instagram on Saturday he would miss the season because of the injury.

Unfortunately, today I suffered an injury to my Achilles and will consequently be missing this season. It's hard for me at this point to make sense of all of this but at the end of the day I understand and trust God's plan for me. My determination to get back and my work ethic will not diminish and I will eventually get back to full strength. I appreciate all those who have reached out and all of those who are praying. You all mean more to me than u know. Thank you. ✊🏾

A photo posted by @kylewilliams.15 on Aug 1, 2015 at 11:54am PDT

Williams, a fifth-year player who had not played in the league in 2014, was trying to make the Broncos roster as part of the rotation at receiver and fill the team’s opening for a punt returner.

He had struggled with hamstring injuries during the Broncos’ offseason program.

“He had been doing good – he missed a lot of OTAs with hamstring and other issues," Kubiak said. “Think he participated in maybe three or four of the OTAs and he’s had some issues the last couple places he’s been."

Williams has never played more than 13 games in any season in his four-year career. He caught 47 passes with the San Francisco 49ers from 2010 to 2013.

Kubiak said he pulled running back Jeremy Stewart out of practice because of tightness in Stewart’s hamstring and defensive lineman Marvin Austin Jr. was pulled out of practice late in the workout with some issues with the heat.