Overview
- The 49ers are suffering another concentrated set of training-camp injuries this week, including Nick Bosa being listed week-to-week with tendinitis in his surgically repaired knee.
- The idea that electromagnetic fields from the Mission Substation next to the practice site cause the injuries has spread on social media and among some observers despite official denials.
- The team hired an independent expert whose readings, according to GM John Lynch, found no safety problem, and Pablo Torre’s recent investigation produced inconclusive results that tend to support that finding.
- Some players have asked for the issue to be looked into but most say they are not convinced the substation explains the injury pattern, with team leaders emphasizing other explanations.
- Because the facility sits beside the substation and is running out of space, relocation discussions have resurfaced and would remove the proximity question even if science remains unsettled.