EL SEGUNDO, Calif. — Los Angeles Chargers wide receiver Mike Williams has retired from the NFL at age 30. His agent, Tory Dandy, told general manager Joe Ortiz on Wednesday night, hours before the Chargers became the first NFL team to open training camp Thursday.

Yahoo Sports is on the road this summer hitting camps across the country, and we're rounding up the news, updates, position battles and more you need to know.