HOUSTON — Miami Dolphins wide receiver Grant DuBose suffered a significant head injury in Sunday’s game against the Houston Texans at NRG Stadium. In the third quarter, DuBose was running across the middle on a route when Texans safety Calen Bullock collided with him, making helmet-to-helmet contact. DuBose lied motionless on the field for more than 10 minutes as medical professionals attended to him.