The Miami Dolphins quarterback is preparing for his second season in the NFL.
The head coach told reporters: "Primarily decision-making, number one, and then accuracy, number two.
"I wouldn't say the accuracy, the location has been perfect every pass, but it hasn't been bad to the degree where it hasn't been bouncing off of receivers and into the hands of the defense.
"We've virtually covered every situation we can, so our guys should be prepared to play a good football game [against the Dallas Cowboys] Sunday night in Canton."
The Dolphins finished second in the AFC East last season.