Wide receiver Jauan Jennings left Sunday's practice early because of a calf issue. It's the second time this offseason he's dealt with a calf problem. Jennings also had a calf ailment in OTAs according to the San Francisco Chronicle's Eric Branch.

The San Francisco 49ers have kicked off their training camp with a focus on the receiver position. Jauan Jennings led the way in practice despite seeking a new contract.