Gyorko, who will start at second base on Opening Day on Monday against the Mets, was given No. 9 to wear. Ross, the Padres' fifth starter, will wear No. 38. Finally, infielder Cody Ransom has opted to keep No. 1, the number he wore all spring.
Gyorko said there was no specific request on his part for No. 9.
"They just gave it to me," he said.
There has been some number shuffling since the end of last season, as Saturday's pitcher Jason Marquis is now wearing No. 21. That number belonged to backup catcher John Baker last season. Baker now has No. 8.
Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.