Manager Andy Green said he doesn't expect either injury to linger. He's hopeful Richard will be available to throw a bullpen session Friday, while Sanchez could take a few days before getting back onto the field.
Left fielder Alex Dickerson, who hasn't practiced since Sunday because of a stiff back, appears to be healing. Dickerson felt "substantial improvement" Thursday, Green said. He remains day-to-day.
The Padres' top three pitching prospects are among 48 players taking part in a Minor League minicamp this week. Anderson Espinoza, Cal Quantrill and Adrian Morejon were on hand Thursday for the first workout.
On the offensive side, six of the club's top 10 hitting prospects are in big league camp. But the other four -- first baseman Josh Naylor and outfielders Michael Gettys, Jorge Ona and Buddy Reed -- took part in minicamp.
The first official workout for Minor Leaguers is March 7, with games set to begin March 15.
Intentional walk talk
Green says he's indifferent about the most recent rule change, which allows a dugout sign for an intentional walk instead of requiring pitchers to throw four balls. Managers need only to show four fingers -- the universal sign for a free pass -- to put a batter on first base.
Thing is, the Padres also used four fingers as their sign to bring the infield in. They won't be doing that anymore.
"The only thing I'm concerned about is that I'm going to hold up four fingers for our infield to play in, and the next thing you know, we're going to be intentionally walking somebody," Green said. "We just changed our sign for infield in ... so that I don't accidentally intentionally walk somebody."
Will Green miss being heckled when he opts to walk a tough opposing hitter on the road?
"They'll still have about 5 1/2 seconds to boo me," he quipped.
AJ Cassavell covers the Padres for MLB.com. Follow him on Twitter @ajcassavell. This story was not subject to the approval of Major League Baseball or its clubs.