Manager Bud Black said the soreness Wieland experienced Saturday was in the same area where Wieland had a triceps strain last year during his recovery and rehabilitation, which led to a stress reaction that slowed his rehab program.
This is a different area than the ulnar collateral ligament that was repaired on July 27, 2012.
"My conversations with Joe were more about the discomfort coming from the back of the elbow, sort of similar to the same discomfort he had last summer coming back through his rehab process," Black said. "He just indicated to me his discomfort was to the back part of the elbow."
Wieland appeared in four games this spring, allowing nine earned runs over seven innings -- including five earned runs in 2 1/3 innings on Saturday against the Dodgers. It was after that outing that he reported soreness in the elbow.
To that point, though, the Padres and Wieland were encouraged with the way he was throwing, including the notable uptick in velocity that often saw him hit the mid-90s.
"He was throwing the ball well considering it was February into March," Black said of Wieland, who was likely to open the season with Triple-A Tucson. "The encouraging thing is he made all of his required throwing assignments -- the side sessions, the batting practices, the games he pitched and all the work between starts, he made those without interruption or time needed between. That's a good thing."
While Wieland didn't appear in any games for the organization last season, he made two appearances in the Arizona Fall League and was looking forward to making up for lost time this season.
Black is hopeful that Wieland will be back in camp soon and ready to return to his routine.
"Hopefully this is something that popped up, and that with time and rest, we'll get him back on the horse at some point," Black said.
Wieland wasn't projected to be part of the starting rotation, though losing him for any great length of time would certainly hurt San Diego's depth. Early last month, the Padres discovered that left-handed pitcher Cory Luebke would need a second Tommy John surgery.
Luebke had his surgery last month and has already started his rehabilitation program, though he'll miss all of 2014.