The San Francisco 49ers' reported contract extension for offensive coordinator Greg Roman appears well earned.Under Roman, who arrived with coach Jim Harbaugh before the 2011 season, the team has set franchise records for offense while setting an NFL standard for creativity within the running game especially.San Francisco 49ers OffenseFormer quarterback Alex Smith set a single-game NFL record for completion percentage (minimum 15 attempts) by connecting on 18 of 19 passes against Arizona last season.