San Diego manager Bud Black said Maybin suffered the injury making a difficult catch Monday against the Dodgers.
Black indicated Wednesday that Maybin could need more than the allotted 15 days on the disabled list to heal. He will be in the splint for at least a week.
"He's got to let the wrist calm down," Black said. "He jammed it into the ground pretty good. [The shot] helps the recovery."
Maybin, who had soreness in the wrist as recently as Spring Training, is hitting .091 in 33 at-bats. The Padres will use Will Venable, Chris Denorfia and possibly Alexi Amarista in center field in Maybin's absence.
On Friday, it was Denorfia who got the start in center field against Giants pitcher Madison Bumgarner. Denorfia, who went into the game with a .406 average in 32 at-bats against Bumgarner, led off the game with a double and later scored the Padres' first run.
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.