Miller was drafted in the first round by the moribund
Atlanta Falcons in 1987 as the third of four quarterbacks (
Vinny Testaverde,
Kelly Stouffer, and
Jim Harbaugh) selected in the first round. In a season that saw the team use five quarterbacks where
Scott Campbell had the most playing time, Miller started the last two games of a 3–12 season. He threw four interceptions in both his debut against San Francisco and his next game against Detroit, although he did record his first touchdown pass in the former. Miller was tapped to be the starter for the 1988 season. Injuries would limit him to 13 starts and a 5–8 record while throwing 11 touchdowns to 12 interceptions on 2,133 yards. The next season saw him play 15 games and throw for 3,459 yards with 16 touchdowns to 10 interceptions while leading the league in interception percentage (1.9%) although Atlanta went 3–12. Miller started the first 12 games of the 1990 season and threw for 2,735 yards with 17 touchdowns to 14 interceptions but went 3–9. 1991 would be his best season as a starter. In fourteen starts, the Falcons went 9–5 with Miller under center while throwing for 3,103 yards with 26 touchdowns to 18 interceptions. The Falcons qualified for the postseason that year for the first time in nine years. In the Wild Card Round against the New Orleans Saints on the road, he threw 18-of-30 for 291 yards with three touchdowns and one interception in a 27–20 victory for their first playoff victory since 1978. In the Divisional Round matchup against Washington, he went 17-of-32 for 178 yards with four interceptions as the Falcons lost 24–7 to the eventual
Super Bowl champions. Miller was mired by injury in 1992, playing in just eight games (having a 15:6 TD/INT ratio) that year while having a career-high throw for 89 yards during the season. He tore his ACL at the
Georgia Dome when his spikes were caught in the turf. The next year saw him start just two games and go 0–2 before he tore the same ACL against Pittsburgh. He moved to the Los Angeles Rams as a free agent in 1994. He served as the starter for 10 games and threw for 2,104 yards with 16 touchdowns to 14 interceptions. The 1995 season was his last as a general starter, where he went 7–6 while throwing for 2,623 yards with 18 touchdowns to 15 interceptions. After being released by the Rams in the offseason, he elected to retire, having suffered five
concussions in the span of 14 months. In 1999, Miller was recruited to serve in the quarterbacks room of the Denver Broncos, who had rookie
Brian Griese and
Bubby Brister after the retirement of
John Elway in the offseason. Miller wound up starting three games for the team, going 2–1 with 527 passing yards combined. A collision during a run-fake on Monday Night game against Oakland saw him suffer a concussion that convinced him that it was best to retire for good in January 2000. He was inducted into the
Oregon Sports Hall of Fame in 2005. ==Career statistics==