"It was more mental," he said. "When your body isn't all the way how you want it to be or need it to be on game day, I might think I've missed a step."
Raiders WR Roberts hopes better health leads to better play →
"If you play well, you'll be on the field," he said. "This is a great organization. Drafted or undrafted, you have to come ready to make the team and come ready to play football."
Undrafted Raiders CB Breon Borders makes most of chance →