CORTLAND, N.Y. -- Rookie quarterback Geno Smith suffered a mild ankle sprain in the New York Jets' preseason opener Friday night, a league source said Saturday. He's not expected to miss significant time, if any.

The team didn't provide an official update, but this confirms what Smith said after the 26-17 loss to the Detroit Lions. He said it wasn't a severe injury and didn't expect to miss practice time. He said X-rays were negative.

Smith rolled his right ankle on an open-field scramble in the third quarter. He came out immediately after completing 6-of-7 passes for 47 yards.

The Jets return to practice Sunday. They break training camp Thursday and face the Jacksonville Jaguars next Saturday at MetLife Stadium.

Rex Ryan hasn't revealed his quarterback plans for the Jaguars game. Mark Sanchez started in Detroit and was replaced by Smith after three series. It has been widely assumed that Smith, competing with Sanchez, would start the second game.