PEORIA, Ariz. -- Padres reliever Joe Thatcher got some "peace of mind" Friday when the results of an MRI on his sore left shoulder showed no structural damage.

"It's just a matter of getting the inflammation out of there, and hopefully we'll be ready to go," Thatcher said Saturday morning. "We'll continue to rehab but there's peace of mind there's nothing wrong."

Thatcher was officially shut down from throwing Friday following a throwing session on flat ground the previous day which led to continued discomfort in his shoulder.

Thatcher, who has already had a cortisone shot this spring, was set to receive another on Saturday. There's no timetable as to when he'll resume throwing, but he's certain to start the regular season on the disabled list again.

"In the big picture, yes," Padres manager Bud Black said when asked if Thatcher's MRI was perceived as good news. "When you get a scan, you don't know what to expect."

Last spring, Thatcher landed on the disabled list to start the season with soreness in his shoulder, essentially in the same spot. He started the season with Triple-A Portland and was promoted to the Padres on April 22.

Thatcher went on to become one of the best left-handed specialists in the league, posting a 1.29 ERA in 65 games. Left-handed batters hit .197 against him.

Venable making progress in leadoff spot

PEORIA, Ariz. -- After missing three games with a sore left side, Padres outfielder Will Venable returned to the lineup Friday against the Angels.

It looked like he had never left, as Venable reached base four times -- three times with singles and another on a walk -- in the Padres' 7-6 loss in Tempe, Ariz.

Venable, who served as the designated hitter, is still a few days away from returning to the outfield because his side still hurts when he throws.

"I felt really good," Venable said. "I was able to do all the things I've been working on. I'm happy with the results, not just the hits. I just have a really good feel right now."

Venable, who is hitting .370 with a .471 on-base percentage this spring, has worked since the end of last season on keeping his head still, shortening his stride and not collapsing on his back leg.

He's also worked this spring on seeing a lot of pitches, which is something that could prove vital if he ends up hitting in the leadoff spot more often than not in the regular season.

"I'm trying to see more pitches, but I've finally got my head in a position where I'm seeing the ball so much better," he said.

San Diego manager Bud Black has noticed.

"I've seen his body more quiet at the plate," Black said. "He's seeing pitches. To me, throughout the at-bat, he looks in more control. He's dictating the at-bat."

Frandsen beginning to heat up at the plate

PEORIA, Ariz. -- After going hitless in his first 18 at-bats of the spring, Padres infielder Kevin Frandsen got a single during a seventh-inning at-bat against the Giants on March 11.

His teammates, jokingly, asked for the ball to be returned to the dugout.

"That was kind of a fun deal," Frandsen said Saturday, smiling.

Frandsen, a non-roster invitee trying to make the 25-man Opening Day roster as a utility infielder, has six hits in his last 12 at-bats, including a home run and a three-run double Friday against the Angels, a team he played with last season.

"The only thing I've been taught is to try and put the barrel on the ball. Even during that streak, I felt like I did that," said Frandsen, who didn't have a single strikeout in his first 18 hitless at-bats.

"I knew I had good at-bats in that stretch. I might have been a little frustrated, but I tried to stay pretty even."

Rizzo a smash in Minor League action

PEORIA, Ariz. -- Anthony Rizzo, one of the key pieces the Padres acquired from the Red Sox in the Adrian Gonzalez deal, had a big day at the plate on Friday in a Minor League game against the Royals' Triple-A team.

Rizzo, a first baseman who impressed manager Bud Black and his staff before being sent out to Minor League camp a week ago, had four hits in five at-bats with two doubles. He also drove in seven runs.

Rizzo hit .421 in 19 at-bats for the Padres in Cactus League play with three doubles, one home run and four RBIs.

Rizzo is set to begin the season with Triple-A Tucson.