Jason Miller grew up playing in the Edmonton minor hockey system and played with the Edmonton Pats of the AAHA in 1986-87 season at the age of 15 where he scored 38 goals and 69 points in 40 games. He had a very successful major junior career with the Medicine Hat Tigers of the WHL. In his first season with the club, the Tigers successfully defended their Memorial Cup championship in Chicoutimi, Quebec, defeating the OHL's Windsor Spitfires 7-6 in the final. Miller blossomed offensively in his second year, scoring 51 goals and 106 points in 72 games. The strong offensive output at just 17 earned him lots of notice from the NHL's Central Scouting Bureau. In the 1989 NHL Entry Draft he was selected in the first round, 18th overall by the New Jersey Devils.
Miller remained with the Tigers for another two years, playing out his junior eligibility and continued to show his scoring prowess. In his final year he netted 60 goals and 136 points to lead the team. He played in one NHL game with the Devils in 1990-91.
Despite a good training camp the following September, Miller was unable to crack the Devils starting roster and was sent to the team's minor-league affiliate in Utica where he played 71 games. He was called up to fill in for injuries with New Jersey for three games, but again was held off the scoresheet. He played two more games with New Jersey in 1992-93, the last time he played in the NHL.
After toiling in the minors with Albany and Adirondack for another two years, Miller decided to move to Finland where he signed a deal with the Hameenlinna HPK. He soon packed his bags again and headed to Germany where he suited up for the Kaufbeuren Eagles. Hoping he would be rejuvenated and ready to play in the NHL, Miller returned and hoped to have a good showing in the IHL with Peoria to finish off the 1995-96 season. He remained in the IHL with San Antonio, posting decent offensive numbers, but garnered little interest from any NHL clubs.
Miller returned to Germany for the 1997-98 season, signing with Dusseldorf AG. Since 1998-99 he has been a member of the Nuernberg Ice Tigers.