DENVER — Cardinals lefty Mark Mulder is on his way to St. Louis — not to throw a bullpen or workout at the facilities at Busch Stadium, but to meet with the team’s doctor about his twice surgically repaired left shoulder.

Manager Tony La Russa said in the debriefing of Mulder’s rehab start Monday night in Memphis it mentioned the lefty “felt some shoulder fatigue.” Mulder will meet with Dr. George Paletta on Wednesday morning to get a look at how his shoulder is after his fifth rehab start.

Mulder is scheduled to start Saturday in Tucson for Triple-A Memphis.

Asked if Mulder’s meeting with the doctor signals that his next start could be in jeopardy, La Russa said: “I would say so.”

Mulder is due to come off his 30-day rehab assignment May 14.

General manager John Mozeliak saw in person Mulder pitch Monday (more on that game can be found here, from reporter Jim Masilak), and the GM said afterward Mulder mentioned the fatigue sensation in his shoulder. Mulder allowed seven runs on nine hits over six innings. He threw 90 pitches.

“We hope it’s nothing serious,” Mozeliak said this evening. “I hate to characterize it until he’s seen the doctor and we know the results of that.”

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