New defensive coordinator Wade Phillips employed Atwater close to the line of scrimmage in order to fortify Denver's run defense and he led the team in tackles, finishing with 129 tackles his rookie season. Denver's defense jumped 20 spots to finish 7th against the run and tied for 3rd best in yards per carry with a 3.7 yard average. That same year, Atwater finished 2nd to the Kansas City Chiefs' Derrick Thomas in Defensive Rookie of the Year voting. The additions of rookies Atwater and Bobby Humphrey, along with key free agent signings, helped Denver rebound from 8–8 in 1988 to AFC Super Bowl representative in 1989.