Cardinals closer Edward Mujica’s soreness and stiffness in his right shoulder is likely the result of fatigue, the righthander and club officials said Thursday.

Mujica met with the team’s medical staff and its chiropractor Thursday to work on the shoulder, Mujica’s sore lat muscle, and what the closer described as “a knot” near his neck.

After the game, Mujica confirmed that he was evaluated by a team physician and that he received treatment for the sore muscle that could keep him off the mound for at least another day.

He was unavailable to pitch Thursday night after receiving the treatment.

Referencing the structure of the closer's arm and shoulder, general manager John Mozeliak said Mujica is “from a health standpoint, 100 percent good to go.”

Mujica was able to pitch through the soreness in his save Wednesday, saying that discomfort doesn’t start until after an appearance.

Mujica had only one two-inning appearance in the first half of the season. Three of his last five appearances have been two innings long and a fourth, Wednesday, was 1 1/3 innings.

“We’re ready to go in the bullpen in whatever the situation is,” Mujica said. “But (it’s different) than going back-to-back games, three games in a row. Too many pitches make your body a little tight. Maybe my back right now is paying me back for that.”

Derrick Goold covers the Cardinals and Major League Baseball for The Post-Dispatch. Follow him on Twitter at @dgoold or on Facebook at Facebook.com/BirdLandPD

Derrick Goold is the lead Cardinals beat writer for the St. Louis Post-Dispatch and current president of the Baseball Writers' Association of America.