Rams quarterback Matthew Stafford missed Monday's practice in an unexpected development as he continues to nurse a back injury.

Los Angeles coach Sean McVay declared over the weekend that the 37-year-old signal-caller would participate in his first training camp practice on Monday.

Instead, Stafford was dressed in street clothes and reporters observed him stepping into an Airstream-type trailer known as an Ammortal chamber at the team's training complex in Woodland Hills, Calif.

The Ammortal chamber is advertised as a "wellness device that aims to optimize human performance and promote holistic health through a combination of non-invasive technologies."

Stafford is dealing with an aggravated disc in his back, which has limited his preparation as he heads into his 17th season.

In his a

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