sentences:  He attended the University of Texas.His brother Lyle Blackwood also played in the NFL, and they were teammates from 1981 through 1986 with the Miami Dolphins.On a Monday night game against Buffalo in 1981, Glenn at strong safety and Lyle at free safety ganged up to put some heavy hits on the Bills’ players, prompting a Miami sportswriter to dub them "The Bruise Brothers."