49ers quarterback Brock Purdy's return to the starting role might be brief.

Purdy re-injured his toe in San Francisco's 26-21 loss to the Jaguars on Sunday, leaving his availability up in the air on a short week, head coach Kyle Shanahan said Monday.

The 49ers (3-1) are set to visit the Los Angeles Rams (3-1) on Thursday night, a critical early test in the tightly packed NFC West.

Purdy played in the 26-21 defeat on Sunday afternoon and told reporters afterward that he felt fine. But Shanahan said Monday morning that Purdy had called him on Sunday night and said the injury, a form of turf toe, again was bothering him.

The quarterback is expected to be evaluated on Monday afternoon, Shanahan said.

"Hopefully, we'll find out more later today, but any time guys are sore and hurting on a

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