March 25-28 - Owners meetings, Palm Beach, Fla.
April 26-28 - NFL draft, New York.
Late July - Training camps open.
Aug. 9-13 - Preseason openers.
Sept. 5 - Regular-season opener.
Sept. 9-10 - First full regular-season weekend.
Niners head coach Kyle Shanahan said Monday that wide receiver Deebo Samuel and linebacker Fred Warner are each likely to miss Week 13's game against the host Seattle Seahawks and Samuel could also miss another game.
Dallas Cowboys defensive tackle Trysten Hill has been suspended two games without pay by the NFL for his postgame punch in an altercation with Las Vegas Raiders offensive lineman John Simpson, NFL Network Insider Ian Rapoport and NFL Network's Tom Pelissero reported Monday.