In May 1985, shortly after calling after working the 17th hole at the Masters and calling Game 1 of the NBA Playoff series between Portland Trail Blazers and Los Angeles Lakers, play-by-play announcer Frank Glieber died of a heart attack. Tom Brookshier, who previously served as Summerall's color commentator prior to Madden, replaced Glieber in the NFL on CBS broadcast booth. For the 1985 season, the NFL showed a ratings increase on all three networks for the season, gaining 4 percent on NBC, 10 on CBS, and 16 on ABC.