Christian McCaffrey is once again dealing with an injury. The star San Francisco 49ers running back was limited during Thursday's practice with a calf injury. McCaffrey went through his typical warmup prior to practice before ultimately appearing on the team's injury report.

While McCaffrey, 29, is one of the NFL's top offensive players, injuries have dogged him at times over the course of his career. He missed the first eight games of last season after dealing with Achilles tendinitis. He appeared in four games before missing the remainder of the season with a knee injury suffered in Week 13 vs. the Bills .

With those issues behind him, McCaffrey appeared to be back to full strength this offseason. The three-time first-team All Pro had no restrictions at the start of the 49er

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